Locke

Locke

Locke

John Locke (1632–1704) was an English philosopher and physician, one of the most influential Enlightenment thinkers. His work in Epistemology, Political Philosophy, and religious toleration laid foundations for classical liberalism and had direct influence on the American and French Revolutions.

Life

Born in Somerset, England, Locke studied medicine at Oxford and became associated with Anthony Ashley Cooper (later the Earl of Shaftesbury). He was deeply involved in the political upheavals of Restoration England and spent years in exile in Holland, returning after the Glorious Revolution of 1688. His major works were all published in the last years of his life.

Epistemology: The Blank Slate

In the Essay Concerning Human Understanding (1689), Locke attacked the rationalist doctrine of innate ideas (held by Descartes and Leibniz):

"Let us then suppose the mind to be, as we say, white paper, void of all characters, without any ideas."

All knowledge derives from experience — specifically from two sources:

  • Sensation — outer experience of the physical world
  • Reflection — inner experience of our own mental operations

This is the tabula rasa (blank slate) doctrine: the mind at birth contains no ideas; all content is built from experience. Compare with Hume's more radical empiricism.

Primary and Secondary Qualities

Locke distinguished:

  • Primary qualities — truly in objects: solidity, extension, motion, number
  • Secondary qualities — powers to produce experiences in us: color, taste, smell, sound

This raises questions about the relationship between perception and reality that Hume and Kant would later address.

Political Philosophy

Locke's Two Treatises of Government (1689) is the foundational text of classical liberalism:

State of Nature

Unlike Hobbes, Locke's state of nature is not a war of all against all. Humans in the state of nature are governed by natural law (reason) and possess:

  • Right to life
  • Right to liberty
  • Right to property (created by mixing one's labor with resources)

Social Contract

The Social Contract transfers some rights to government — but only for the purpose of better protecting the natural rights we already have. Government is a trustee, not sovereign.

Right of Revolution

If government violates natural rights — acting tyrannically or failing in its trust — the people have the right (and duty) to revolt and replace it. This directly influenced the American Declaration of Independence.

Separation of Powers

Locke distinguished legislative, executive, and federative powers, arguing against absolute monarchy. His work influenced Montesquieu and later constitutional design.

Religious Toleration

In the Letter Concerning Toleration (1689), Locke argued that the state has no authority over religious belief — the soul is not subject to political coercion. This was a radical position for its time.

Influence

  • Locke's political theory was directly cited in the American Declaration of Independence (life, liberty, and "the pursuit of happiness" echoes Locke's "life, liberty, and property")
  • His Epistemology shaped Hume and was a target for Kant
  • Classical liberalism (freedom, rights, limited government) traces directly to Locke
  • Rousseau and Marx both engaged critically with Locke's theory of property
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