John Locke
John Locke (1632-1704) was an English philosopher and physician, one of the most influential thinkers of the Enlightenment and often called the 'Father of Liberalism.' His ideas about knowledge, government, and human rights shaped modern philosophy and helped lay the intellectual foundations of modern democracy.
In An Essay Concerning Human Understanding, Locke argued that the mind begins as a 'blank slate' and that all our knowledge comes from experience — a cornerstone of empiricism. In his Two Treatises of Government, he argued that legitimate political power rests on the consent of the governed and that people have natural rights to life, liberty, and property — ideas that directly influenced the American Declaration of Independence.
Locke also wrote influential works on religious toleration and education. Living through a turbulent age of revolution in England, he helped articulate the principles of limited, accountable government.
His prose is careful and reasoned but formal. Our editions present his key ideas clearly. Read a selection free, and read or listen with a membership.
John Locke in the library · 2 works
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Second Treatise of Government
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Frequently asked questions about John Locke
What did John Locke write?
Locke's most important works are An Essay Concerning Human Understanding, on the nature and limits of human knowledge, and the Two Treatises of Government, on political authority and natural rights. He also wrote A Letter Concerning Toleration and Some Thoughts Concerning Education. These works had a profound influence on philosophy and modern politics.
What is John Locke best known for?
Locke is best known for two ideas: that all knowledge comes from experience rather than being innate (the 'blank slate'), and that legitimate government rests on the consent of the governed, who hold natural rights to life, liberty, and property. The second idea directly shaped the American and French revolutions and modern democratic thought.
How did Locke influence the American founding?
Locke's argument that governments exist to protect people's natural rights, and that citizens may replace a government that fails to do so, deeply influenced the American revolutionaries. Thomas Jefferson drew on Locke's language of 'life, liberty, and property' in the Declaration of Independence's 'life, liberty, and the pursuit of happiness.' His ideas are woven through the foundations of modern democracy.
Where should I start with Locke?
For his political thought, the Second Treatise of Government is the essential and most readable text. For his theory of knowledge, the Essay Concerning Human Understanding is fundamental but long, so many readers begin with selections. A Letter Concerning Toleration is a short, powerful introduction to his ideas on freedom.
Is John Locke hard to read?
His arguments are clear and logical, but his 17th-century prose is formal and can be dense, especially in the longer Essay. His political writing is generally more approachable than his work on knowledge. A modern-English edition makes his reasoning much easier to follow.
When did John Locke live?
Locke lived from 1632 to 1704, during a century of political and religious upheaval in England, including civil war and the Glorious Revolution of 1688. He published his most important works in 1689-1690. He is regarded as a founding figure of the Enlightenment.
Where can I read John Locke for free?
Locke's works are in the public domain and freely available. His original text is formal and can be demanding. Here you can read a selection free in clearer modern English, and read or listen with a membership.
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