
The Age of Enlightenment or the Enlightenment; german: Aufklärung, "Enlightenment"; it, L'Illuminismo, "Enlightenment"; pl, Oświecenie, "Enlightenment"; pt, Iluminismo, "Enlightenment"; es, La Ilustración, "Enlightenment" was an intellectual and philosophical movement that dominated Europe in the
17th
17 (seventeen) is the natural number following 16 and preceding 18. It is a prime number.
Seventeen is the sum of the first four prime numbers.
In mathematics
17 is the seventh prime number, which makes seventeen the fourth super-prime, as s ...
and
18th centuries with global influences and effects.
The Enlightenment included a range of ideas centered on the value of human happiness, the pursuit of knowledge obtained by means of
reason
Reason is the capacity of Consciousness, consciously applying logic by Logical consequence, drawing conclusions from new or existing information, with the aim of seeking the truth. It is closely associated with such characteristically human activ ...
and
the evidence of the senses, and ideals such as
liberty
Liberty is the ability to do as one pleases, or a right or immunity enjoyed by prescription or by grant (i.e. privilege). It is a synonym for the word freedom.
In modern politics, liberty is understood as the state of being free within society fr ...
,
progress
Progress is the movement towards a refined, improved, or otherwise desired state. In the context of progressivism, it refers to the proposition that advancements in technology, science, and social organization have resulted, and by extension w ...
,
toleration
Toleration is the allowing, permitting, or acceptance of an action, idea, object, or person which one dislikes or disagrees with. Political scientist Andrew R. Murphy explains that "We can improve our understanding by defining "toleration" as a ...
,
fraternity
A fraternity (from Latin ''frater'': "brother"; whence, "brotherhood") or fraternal organization is an organization, society, club or fraternal order traditionally of men associated together for various religious or secular aims. Fraternity in ...
, and constitutional government.
The Enlightenment was preceded by the
Scientific Revolution
The Scientific Revolution was a series of events that marked the emergence of modern science during the early modern period, when developments in mathematics, physics, astronomy, biology (including human anatomy) and chemistry transformed ...
and the work of
Francis Bacon
Francis Bacon, 1st Viscount St Alban (; 22 January 1561 – 9 April 1626), also known as Lord Verulam, was an English philosopher and statesman who served as Attorney General and Lord Chancellor of England. Bacon led the advancement of both ...
,
John Locke, and others. Some date the beginning of the Enlightenment to the publication of
René Descartes
René Descartes ( or ; ; Latinized: Renatus Cartesius; 31 March 1596 – 11 February 1650) was a French philosopher, scientist, and mathematician, widely considered a seminal figure in the emergence of modern philosophy and science. Mathe ...
' ''
Discourse on the Method
''Discourse on the Method of Rightly Conducting One's Reason and of Seeking Truth in the Sciences'' (french: Discours de la Méthode Pour bien conduire sa raison, et chercher la vérité dans les sciences) is a philosophical and autobiographica ...
'' in 1637, featuring his famous dictum, ''
Cogito, ergo sum
The Latin , usually translated into English as "I think, therefore I am", is the " first principle" of René Descartes's philosophy. He originally published it in French as , in his 1637 ''Discourse on the Method'', so as to reach a wider audien ...
'' ("I think, therefore I am"). Others cite the publication of
Isaac Newton
Sir Isaac Newton (25 December 1642 – 20 March 1726/27) was an English mathematician, physicist, astronomer, alchemist, theologian, and author (described in his time as a " natural philosopher"), widely recognised as one of the g ...
's ''
Principia Mathematica
The ''Principia Mathematica'' (often abbreviated ''PM'') is a three-volume work on the foundations of mathematics written by mathematician–philosophers Alfred North Whitehead and Bertrand Russell and published in 1910, 1912, and 1913. ...
'' (1687) as the culmination of the Scientific Revolution and the beginning of the Enlightenment. European historians traditionally date its beginning with the death of
Louis XIV
, house = Bourbon
, father = Louis XIII
, mother = Anne of Austria
, birth_date =
, birth_place = Château de Saint-Germain-en-Laye, Saint-Germain-en-Laye, France
, death_date =
, death_place = Palace of Ve ...
of France in 1715 and its end with the 1789 outbreak of the
French Revolution
The French Revolution ( ) was a period of radical political and societal change in France that began with the Estates General of 1789 and ended with the formation of the French Consulate in November 1799. Many of its ideas are conside ...
. Many historians now date the end of the Enlightenment as the start of the 19th century, with the latest proposed year being the death of
Immanuel Kant
Immanuel Kant (, , ; 22 April 1724 – 12 February 1804) was a German philosopher and one of the central Enlightenment thinkers. Born in Königsberg, Kant's comprehensive and systematic works in epistemology, metaphysics, ethics, and aes ...
in 1804.
Philosophers and scientists of the period widely circulated their ideas through meetings at
scientific academies,
Masonic lodge
A Masonic lodge, often termed a private lodge or constituent lodge, is the basic organisational unit of Freemasonry. It is also commonly used as a term for a building in which such a unit meets. Every new lodge must be warranted or chartered ...
s,
literary salons,
coffeehouse
A coffeehouse, coffee shop, or café is an establishment that primarily serves coffee of various types, notably espresso, latte, and cappuccino. Some coffeehouses may serve cold drinks, such as iced coffee and iced tea, as well as other no ...
s and in
printed books,
journals, and
pamphlet
A pamphlet is an unbound book (that is, without a hard cover or binding). Pamphlets may consist of a single sheet of paper that is printed on both sides and folded in half, in thirds, or in fourths, called a ''leaflet'' or it may consist of a f ...
s. The ideas of the Enlightenment undermined the authority of the monarchy and the
Catholic Church
The Catholic Church, also known as the Roman Catholic Church, is the largest Christian church, with 1.3 billion baptized Catholics worldwide . It is among the world's oldest and largest international institutions, and has played a ...
and paved the way for the political revolutions of the 18th and 19th centuries. A variety of 19th-century movements, including
liberalism
Liberalism is a political and moral philosophy based on the rights of the individual, liberty, consent of the governed, political equality and equality before the law."political rationalism, hostility to autocracy, cultural distaste for ...
,
communism
Communism (from Latin la, communis, lit=common, universal, label=none) is a far-left sociopolitical, philosophical, and economic ideology and current within the socialist movement whose goal is the establishment of a communist society ...
, and
neoclassicism, trace their intellectual heritage to the Enlightenment.
The central doctrines of the Enlightenment were
individual liberty
Civil liberties are guarantees and freedoms that governments commit not to abridge, either by constitution, legislation, or judicial interpretation, without due process. Though the scope of the term differs between countries, civil liberties may ...
and
religious tolerance
Religious toleration may signify "no more than forbearance and the permission given by the adherents of a dominant religion for other religions to exist, even though the latter are looked on with disapproval as inferior, mistaken, or harmful". ...
, in opposition to an
absolute monarchy
Absolute monarchy (or Absolutism as a doctrine) is a form of monarchy in which the monarch rules in their own right or power. In an absolute monarchy, the king or queen is by no means limited and has absolute power, though a limited constituti ...
and the fixed dogmas of the Church. The principles of sociability and utility also played an important role in circulating knowledge useful to the improvement of society at large. The Enlightenment was marked by an increasing awareness of the relationship between the mind and the everyday media of the world, and by an emphasis on the
scientific method
The scientific method is an Empirical evidence, empirical method for acquiring knowledge that has characterized the development of science since at least the 17th century (with notable practitioners in previous centuries; see the article hist ...
and
reductionism
Reductionism is any of several related philosophical ideas regarding the associations between phenomena which can be described in terms of other simpler or more fundamental phenomena. It is also described as an intellectual and philosophical pos ...
, along with increased questioning of religious orthodoxy—an attitude captured by
Immanuel Kant
Immanuel Kant (, , ; 22 April 1724 – 12 February 1804) was a German philosopher and one of the central Enlightenment thinkers. Born in Königsberg, Kant's comprehensive and systematic works in epistemology, metaphysics, ethics, and aes ...
's essay ''
Answering the Question: What is Enlightenment'', where the phrase ''
Sapere aude
''Sapere aude'' is the Latin phrase meaning "Dare to know"; and also is loosely translated as “Have courage to use your own reason”, "Dare to know things through reason", or even more loosely as "Dare to be wise". Originally used in the '' F ...
'' (Dare to know) can be found.
Important intellectuals

The Age of Enlightenment was preceded by and closely associated with the
Scientific Revolution
The Scientific Revolution was a series of events that marked the emergence of modern science during the early modern period, when developments in mathematics, physics, astronomy, biology (including human anatomy) and chemistry transformed ...
. Earlier philosophers whose work influenced the Enlightenment included
Francis Bacon
Francis Bacon, 1st Viscount St Alban (; 22 January 1561 – 9 April 1626), also known as Lord Verulam, was an English philosopher and statesman who served as Attorney General and Lord Chancellor of England. Bacon led the advancement of both ...
and
René Descartes
René Descartes ( or ; ; Latinized: Renatus Cartesius; 31 March 1596 – 11 February 1650) was a French philosopher, scientist, and mathematician, widely considered a seminal figure in the emergence of modern philosophy and science. Mathe ...
. Some of the major figures of the Enlightenment included
Cesare Beccaria
Cesare Bonesana di Beccaria, Marquis of Gualdrasco and Villareggio (; 15 March 173828 November 1794) was an Italian criminologist, jurist, philosopher, economist and politician, who is widely considered one of the greatest thinkers of the Age ...
,
Denis Diderot
Denis Diderot (; ; 5 October 171331 July 1784) was a French philosopher, art critic, and writer, best known for serving as co-founder, chief editor, and contributor to the ''Encyclopédie'' along with Jean le Rond d'Alembert. He was a promine ...
,
David Hume
David Hume (; born David Home; 7 May 1711 NS (26 April 1711 OS) – 25 August 1776) Cranston, Maurice, and Thomas Edmund Jessop. 2020 999br>David Hume" ''Encyclopædia Britannica''. Retrieved 18 May 2020. was a Scottish Enlightenment phil ...
,
Immanuel Kant
Immanuel Kant (, , ; 22 April 1724 – 12 February 1804) was a German philosopher and one of the central Enlightenment thinkers. Born in Königsberg, Kant's comprehensive and systematic works in epistemology, metaphysics, ethics, and aes ...
,
Gottfried Wilhelm Leibniz
Gottfried Wilhelm (von) Leibniz . ( – 14 November 1716) was a German polymath active as a mathematician, philosopher, scientist and diplomat. He is one of the most prominent figures in both the history of philosophy and the history of mat ...
,
John Locke,
Montesquieu
Charles Louis de Secondat, Baron de La Brède et de Montesquieu (; ; 18 January 168910 February 1755), generally referred to as simply Montesquieu, was a French judge, man of letters, historian, and political philosopher.
He is the principa ...
,
Jean-Jacques Rousseau
Jean-Jacques Rousseau (, ; 28 June 1712 – 2 July 1778) was a Genevan philosopher, writer, and composer. His political philosophy influenced the progress of the Age of Enlightenment throughout Europe, as well as aspects of the French Revol ...
,
Adam Smith,
Hugo Grotius
Hugo Grotius (; 10 April 1583 – 28 August 1645), also known as Huig de Groot () and Hugo de Groot (), was a Dutch humanist, diplomat, lawyer, theologian, jurist, poet and playwright.
A teenage intellectual prodigy, he was born in Delf ...
,
Baruch Spinoza
Baruch (de) Spinoza (born Bento de Espinosa; later as an author and a correspondent ''Benedictus de Spinoza'', anglicized to ''Benedict de Spinoza''; 24 November 1632 – 21 February 1677) was a Dutch philosopher of Portuguese-Jewish origin, b ...
, and
Voltaire
François-Marie Arouet (; 21 November 169430 May 1778) was a French Enlightenment writer, historian, and philosopher. Known by his '' nom de plume'' M. de Voltaire (; also ; ), he was famous for his wit, and his criticism of Christianity—es ...
.
[Jeremy Black, "Ancien Regime and Enlightenment. Some Recent Writing on Seventeenth-and Eighteenth-Century Europe," ''European History Quarterly'' 22.2 (1992): 247–55.]
One particularly influential Enlightenment publication was the ' (''Encyclopedia''). Published between 1751 and 1772 in thirty-five volumes, it was compiled by
Denis Diderot
Denis Diderot (; ; 5 October 171331 July 1784) was a French philosopher, art critic, and writer, best known for serving as co-founder, chief editor, and contributor to the ''Encyclopédie'' along with Jean le Rond d'Alembert. He was a promine ...
,
Jean le Rond d'Alembert
Jean-Baptiste le Rond d'Alembert (; ; 16 November 1717 – 29 October 1783) was a French mathematician, mechanician, physicist, philosopher, and music theorist. Until 1759 he was, together with Denis Diderot, a co-editor of the '' Encyclop� ...
, and a team of 150 other intellectuals. The ''Encyclopédie'' helped in spreading the ideas of the Enlightenment across Europe and beyond.
Other landmark publications of the Enlightenment included Voltaire's ''
Letters on the English
''Letters on the English'' (or ''Letters Concerning the English Nation''; French: ''Lettres philosophiques'') is a series of essays written by Voltaire based on his experiences living in Great Britain between 1726 and 1729. It was published first ...
'' (1733) and ''
Dictionnaire philosophique'' (''Philosophical Dictionary''; 1764); Hume's ''
A Treatise of Human Nature
'' A Treatise of Human Nature: Being an Attempt to Introduce the Experimental Method of Reasoning into Moral Subjects'' (1739–40) is a book by Scottish philosopher David Hume, considered by many to be Hume's most important work and one of the ...
'' (1740); Montesquieu's ''
The Spirit of the Laws
''The Spirit of Law'' (French: ''De l'esprit des lois'', originally spelled ''De l'esprit des loix''), also known in English as ''The Spirit of the Laws'', is a treatise on political theory, as well as a pioneering work in comparative law, publ ...
'' (1748); Rousseau's ''
Discourse on Inequality
''Discourse on the Origin and Basis of Inequality Among Men'' (french: Discours sur l'origine et les fondements de l'inégalité parmi les hommes), also commonly known as the "Second Discourse", is a 1755 work by philosopher Jean-Jacques Rousse ...
'' (1754) and ''
The Social Contract
''The Social Contract'', originally published as ''On the Social Contract; or, Principles of Political Right'' (french: Du contrat social; ou, Principes du droit politique), is a 1762 French-language book by the Genevan philosopher Jean-Jacque ...
'' (1762); Adam Smith's ''
The Theory of Moral Sentiments
''The Theory of Moral Sentiments'' is a 1759 book by Adam Smith. It provided the ethical, philosophical, economic, and methodological underpinnings to Smith's later works, including ''The Wealth of Nations'' (1776), '' Essays on Philosophical ...
'' (1759) and ''
The Wealth of Nations
''An Inquiry into the Nature and Causes of the Wealth of Nations'', generally referred to by its shortened title ''The Wealth of Nations'', is the '' magnum opus'' of the Scottish economist and moral philosopher Adam Smith. First published in ...
'' (1776); and Kant's ''
Critique of Pure Reason'' (1781).
Topics
Philosophy
Francis Bacon
Francis Bacon, 1st Viscount St Alban (; 22 January 1561 – 9 April 1626), also known as Lord Verulam, was an English philosopher and statesman who served as Attorney General and Lord Chancellor of England. Bacon led the advancement of both ...
's
empiricism and
René Descartes
René Descartes ( or ; ; Latinized: Renatus Cartesius; 31 March 1596 – 11 February 1650) was a French philosopher, scientist, and mathematician, widely considered a seminal figure in the emergence of modern philosophy and science. Mathe ...
'
rationalist philosophy laid the foundation for enlightenment thinking. Descartes attempt to construct the sciences on a secure
metaphysical
Metaphysics is the branch of philosophy that studies the fundamental nature of reality, the first principles of being, identity and change, space and time, causality, necessity, and possibility. It includes questions about the nature of consci ...
foundation was not as successful as his
method of doubt applied in philosophic areas leading to a
dualistic doctrine of mind and matter. His
skepticism
Skepticism, also spelled scepticism, is a questioning attitude or doubt toward knowledge claims that are seen as mere belief or dogma. For example, if a person is skeptical about claims made by their government about an ongoing war then the p ...
was refined by
John Locke's ''
Essay Concerning Human Understanding
''An Essay Concerning Human Understanding'' is a work by John Locke concerning the foundation of human knowledge and understanding. It first appeared in 1689 (although dated 1690) with the printed title ''An Essay Concerning Humane Understan ...
'' (1690) and
David Hume
David Hume (; born David Home; 7 May 1711 NS (26 April 1711 OS) – 25 August 1776) Cranston, Maurice, and Thomas Edmund Jessop. 2020 999br>David Hume" ''Encyclopædia Britannica''. Retrieved 18 May 2020. was a Scottish Enlightenment phil ...
's writings in the 1740s. His dualism was challenged by
Spinoza
Baruch (de) Spinoza (born Bento de Espinosa; later as an author and a correspondent ''Benedictus de Spinoza'', anglicized to ''Benedict de Spinoza''; 24 November 1632 – 21 February 1677) was a Dutch philosopher of Portuguese-Jewish origin, b ...
's uncompromising assertion of the unity of matter in his
''Tractatus'' (1670) and
''Ethics'' (1677).
According to
Jonathan Israel
Jonathan Irvine Israel (born 26 January 1946) is a British writer and academic specialising in Dutch history, the Age of Enlightenment and European Jews. Israel was appointed as Andrew W. Mellon Professor in the School of Historical Studies a ...
, these laid down two distinct lines of Enlightenment thought: first, the moderate variety, following Descartes, Locke, and
Christian Wolff, which sought accommodation between reform and the traditional systems of power and faith, and, second, the Radical Enlightenment, inspired by the philosophy of
Spinoza
Baruch (de) Spinoza (born Bento de Espinosa; later as an author and a correspondent ''Benedictus de Spinoza'', anglicized to ''Benedict de Spinoza''; 24 November 1632 – 21 February 1677) was a Dutch philosopher of Portuguese-Jewish origin, b ...
, advocating democracy, individual liberty, freedom of expression, and eradication of religious authority. The moderate variety tended to be
deistic
Deism ( or ; derived from the Latin ''deus'', meaning "god") is the philosophical position and rationalistic theology that generally rejects revelation as a source of divine knowledge, and asserts that empirical reason and observation of t ...
, whereas the radical tendency separated the basis of morality entirely from theology. Both lines of thought were eventually opposed by a conservative
Counter-Enlightenment
The Counter-Enlightenment refers to a loose collection of intellectual stances that arose during the European Enlightenment in opposition to its mainstream attitudes and ideals. The Counter-Enlightenment is generally seen to have continued from t ...
, which sought a return to faith.
In the mid-18th century, Paris became the center of philosophic and scientific activity challenging traditional doctrines and dogmas. The philosophical movement was led by
Voltaire
François-Marie Arouet (; 21 November 169430 May 1778) was a French Enlightenment writer, historian, and philosopher. Known by his '' nom de plume'' M. de Voltaire (; also ; ), he was famous for his wit, and his criticism of Christianity—es ...
and
Jean-Jacques Rousseau
Jean-Jacques Rousseau (, ; 28 June 1712 – 2 July 1778) was a Genevan philosopher, writer, and composer. His political philosophy influenced the progress of the Age of Enlightenment throughout Europe, as well as aspects of the French Revol ...
, who argued for a society based upon reason as in ancient Greece rather than faith and Catholic doctrine, for a new civil order based on natural law, and for science based on experiments and observation. The political philosopher
Montesquieu
Charles Louis de Secondat, Baron de La Brède et de Montesquieu (; ; 18 January 168910 February 1755), generally referred to as simply Montesquieu, was a French judge, man of letters, historian, and political philosopher.
He is the principa ...
introduced the idea of a
separation of powers
Separation of powers refers to the division of a state's government into branches, each with separate, independent powers and responsibilities, so that the powers of one branch are not in conflict with those of the other branches. The typica ...
in a government, a concept which was enthusiastically adopted by the authors of the United States Constitution. While the ''
philosophes
The ''philosophes'' () were the intellectuals of the 18th-century Enlightenment.Kishlansky, Mark, ''et al.'' ''A Brief History of Western Civilization: The Unfinished Legacy, volume II: Since 1555.'' (5th ed. 2007). Few were primarily philosopher ...
'' of the French Enlightenment were not revolutionaries and many were members of the nobility, their ideas played an important part in undermining the legitimacy of the
Old Regime
Old or OLD may refer to:
Places
*Old, Baranya, Hungary
*Old, Northamptonshire, England
* Old Street station, a railway and tube station in London (station code OLD)
*OLD, IATA code for Old Town Municipal Airport and Seaplane Base, Old Town, M ...
and shaping the
French Revolution
The French Revolution ( ) was a period of radical political and societal change in France that began with the Estates General of 1789 and ended with the formation of the French Consulate in November 1799. Many of its ideas are conside ...
.
Francis Hutcheson, a moral philosopher and founding figure of the
Scottish Enlightenment
The Scottish Enlightenment ( sco, Scots Enlichtenment, gd, Soillseachadh na h-Alba) was the period in 18th- and early-19th-century Scotland characterised by an outpouring of intellectual and scientific accomplishments. By the eighteenth century ...
, described the
utilitarian
In ethical philosophy, utilitarianism is a family of normative ethical theories that prescribe actions that maximize happiness and well-being for all affected individuals.
Although different varieties of utilitarianism admit different charact ...
and
consequentialist
In ethical philosophy, consequentialism is a class of normative ethics, normative, Teleology, teleological ethical theories that holds that the wikt:consequence, consequences of one's Action (philosophy), conduct are the ultimate basis for judgm ...
principle that virtue is that which provides, in his words, "the greatest happiness for the greatest numbers". Much of what is incorporated in the
scientific method
The scientific method is an Empirical evidence, empirical method for acquiring knowledge that has characterized the development of science since at least the 17th century (with notable practitioners in previous centuries; see the article hist ...
(the nature of knowledge, evidence, experience, and causation) and some modern attitudes towards the relationship between science and religion were developed by Hutcheson's protégés in Edinburgh, Scotland,
David Hume
David Hume (; born David Home; 7 May 1711 NS (26 April 1711 OS) – 25 August 1776) Cranston, Maurice, and Thomas Edmund Jessop. 2020 999br>David Hume" ''Encyclopædia Britannica''. Retrieved 18 May 2020. was a Scottish Enlightenment phil ...
and
Adam Smith.
Hume became a major figure in the
skeptical philosophical and
empiricist traditions of philosophy.
Immanuel Kant
Immanuel Kant (, , ; 22 April 1724 – 12 February 1804) was a German philosopher and one of the central Enlightenment thinkers. Born in Königsberg, Kant's comprehensive and systematic works in epistemology, metaphysics, ethics, and aes ...
(1724–1804) tried to reconcile
rationalism
In philosophy, rationalism is the epistemological view that "regards reason as the chief source and test of knowledge" or "any view appealing to reason as a source of knowledge or justification".Lacey, A.R. (1996), ''A Dictionary of Philosophy' ...
and religious belief,
individual freedom
Individualism is the moral stance, political philosophy, ideology and social outlook that emphasizes the intrinsic worth of the individual. Individualists promote the exercise of one's goals and desires and to value independence and self-reli ...
and political authority, as well as map out a view of the public sphere through private and public reason. Kant's work continued to shape German thought and indeed all of European philosophy, well into the 20th century.
Mary Wollstonecraft
Mary Wollstonecraft (, ; 27 April 1759 – 10 September 1797) was a British writer, philosopher, and advocate of women's rights. Until the late 20th century, Wollstonecraft's life, which encompassed several unconventional personal relationsh ...
was one of England's earliest
feminist philosophers. She argued for a society based on reason and that women as well as men should be treated as rational beings. She is best known for her work ''
A Vindication of the Rights of Woman
''A Vindication of the Rights of Woman: with Strictures on Political and Moral Subjects'' (1792), written by British philosopher and women's rights advocate Mary Wollstonecraft (1759–1797), is one of the earliest works of feminist philosoph ...
'' (1791).
Science
Science played an important role in Enlightenment di