Book excerpt: John Locke (1632-1704) was a leading seventeenth-century philosopher and widely considered to be the first of the British Empiricists. One of the most influential Enlightenment thinkers, his major works and central ideas have had a significant impact on the development of key areas in political philosophy and epistemology. The Bloomsbury Companion to Locke is a comprehensive and accessible resource to Locke's life and work, his contemporaries and critics, his key concepts and enduring influence. Including more than 80 specially commissioned entries, written by a team of leading experts, topics range from absolutism to toleration, from education to socinianism. The Companion features a series of indispensable research tools including a chronology of Locke's life, an A-Z of his key concepts and synopses of his principal writings. This is an essential resource for anyone working in the fields of Locke Studies and Seventeenth-Century Philosophy.