Baruch Spinoza was a Dutch philosopher of Sephardi/Portuguese origin. By laying the groundwork for the 18th-century Enlightenment and modern biblical criticism, including modern conceptions of the self and the universe, he came to be consid...

John Locke was an English philosopher and physician regarded as one of the most influential of Enlightenment thinkers and known as the "Father of Classical Liberalism". Considered one of the first of the British empiricists, following the t...

Robert Hooke, natural philosopher, inventor, architect, chemist, mathematician, physicist, engineer. Robert Hooke is one of the most neglected natural philosophers of all time. The inventor of, amongst other things, the iris diaphragm in ca...

William Penn was an English real estate entrepreneur, philosopher, early Quaker and founder of the Province of Pennsylvania, the English North American colony and the future Commonwealth of Pennsylvania. He was an early advocate of democrac...

Gottfried Wilhelm von Leibniz was a German mathematician and philosopher. He occupies a prominent place in the history of mathematics and the history of philosophy. Leibniz developed calculus independently of Isaac Newton, and Leibniz's...

François-Marie Arouet, better known by the pen name Voltaire, was a French Enlightenment writer and philosopher famous for his wit and for his advocacy of civil liberties, including freedom of religion and free trade. Voltaire was a proli...

David Hume was a Scottish philosopher, historian, economist, and essayist known especially for his philosophical empiricism and scepticism. He was one of the most important figures in the Scottish Enlightenment, and in the history of Wester...

As a brilliant, undisciplined, and unconventional thinker, Jean-Jacques Rousseau spent most of his life being driven by controversy back and forth between Paris and his native Geneva. Rousseau first attracted wide-spread attention with his...

Immanuel Kant was a German philosopher who is widely considered to be a central figure of modern philosophy. He argued that fundamental concepts structure human experience, and that reason is the source of morality. His thought continues to...

Joseph Priestley was an 18th-century English theologian, Dissenting clergyman, natural philosopher, educator, and political theorist who published over 150 works. He is usually credited with the discovery of oxygen, having isolated it in it...

Maximilien François Marie Isidore de Robespierre, known to his contemporaries also as "the Incorruptible", is one of the best known of the leaders of the French Revolution. He earned the nickname of "the Incorruptible" through his selfless...

Georg Wilhelm Friedrich Hegel was a German philosopher, and a major figure in German Idealism. His historicist and idealist account of reality revolutionized European philosophy and was an important precursor to Continental philosophy and M...

Charles Babbage was an English mathematician, analytical philosopher, mechanical engineer and (proto-) computer scientist who originated the idea of a programmable computer. Parts of his uncompleted mechanisms are on display in the London S...

Karl Heinrich Marx was a German philosopher, economist, sociologist, historian, journalist, and revolutionary socialist. Marx's work in economics laid the basis for the current understanding of labour and its relation to capital, and has in...

Friedrich Engels was a German social scientist, author, political theorist, philosopher, and father of Marxist theory, alongside Karl Marx. In 1845 he published The Condition of the Working Class in England, based on personal observatio...