John Locke

Early Life and Education

John Locke was born on August 29, 1632, in Wrington, Somerset, England. His father was a country attorney and small landowner who had served as a captain in the Parliamentary cavalry during the English Civil War. Through his father's connections to the Parliamentarian commander Alexander Popham, Locke secured a place at Westminster School and then at Christ Church, Oxford, where he matriculated in 1652.

Locke found the scholastic curriculum at Oxford stifling but thrived in the study of medicine and natural philosophy. He was deeply influenced by the experimental approach of Robert Boyle, with whom he collaborated on scientific work, and by the physician Thomas Sydenham, who advocated careful clinical observation over theoretical speculation. Though Locke never took a medical degree, he practiced medicine throughout his life and brought an empirical, observational temperament to philosophy.

Association with Shaftesbury

In 1666, Locke met Anthony Ashley Cooper, later the 1st Earl of Shaftesbury, and entered his service as physician, secretary, and political advisor. This association was transformative. Shaftesbury was one of the most powerful and controversial political figures in Restoration England — a champion of parliamentary rights, religious toleration, and the exclusion of the Catholic Duke of York (the future James II) from the throne.

Through Shaftesbury, Locke was drawn into the world of high politics, colonial administration (he helped draft the Fundamental Constitutions of Carolina), and the intense political crises of the 1670s and 1680s. When Shaftesbury fell from power and fled to Holland (where he died in 1683), Locke followed him into exile.

Dutch Exile and the Glorious Revolution

Locke spent six years in the Dutch Republic (1683–1689), where he completed his two greatest works: the Essay Concerning Human Understanding and the Two Treatises of Government. He also wrote his Letter Concerning Toleration (Epistola de Tolerantia), arguing that the state has no right to impose religious conformity.

Locke returned to England in February 1689, arriving on the same ship as Princess Mary, who with her husband William of Orange had been invited to take the English throne in the Glorious Revolution of 1688. Locke's political philosophy provided the most powerful intellectual justification for this constitutional settlement.

Major Works

The Essay Concerning Human Understanding (1689) is one of the founding texts of British empiricism. Locke argued that the mind at birth is a tabula rasa (blank slate) — there are no innate ideas or principles. All knowledge derives from experience: from sensation (the external senses) and reflection (the mind's observation of its own operations). The Essay examines the nature, scope, and limits of human understanding, developing theories of personal identity, the association of ideas, and the distinction between primary and secondary qualities.

The Two Treatises of Government (1689) demolished the divine-right absolutism of Sir Robert Filmer (First Treatise) and constructed a theory of legitimate government based on natural rights and the social contract (Second Treatise). In the state of nature, individuals possess natural rights to life, liberty, and property (understood as the product of labor mixed with nature). Government exists by consent to protect these rights; when it fails or becomes tyrannical, the people retain the right of revolution.

Later Life

After the Revolution, Locke held various government positions, including Commissioner of the Board of Trade. He spent his final years at Oates, the Essex estate of his close friend Lady Damaris Masham (daughter of the Cambridge Platonist Ralph Cudworth). He continued writing on education, economics, and theology until his death on October 28, 1704.

Legacy

Locke's influence is difficult to exaggerate. His empiricist epistemology defined the trajectory of British philosophy through Berkeley and Hume to the present. His political philosophy shaped the American Declaration of Independence (Jefferson drew directly on Locke), the French Declaration of the Rights of Man, and the entire liberal-democratic tradition. His arguments for religious toleration, the separation of church and state, and the consent of the governed remain foundational principles of free societies.