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551 BCE
Confucuis
Chinese teacher, writer, and philosopher Confucius viewed himself as a channel for the theological ideas and values of the imperial dynasties that came before him. With an emphasis on family and social harmony, Confucius advocated for a way of life that reflected a spiritual and religious tradition, but which was also distinctly humanist and even secularist. -
470 BCE
Socrates
A necessary inclusion by virtue of his role as, essentially, the founder of Western Philosophy, Socrates is nonetheless unique among entrants on this list for having produced no written works reflecting his key ideas or principles. Thus, the body of his thoughts and ideas is left to be deciphered through the works of his two most prominent students, Plato and Xenophon, as well as to the legions of historians and critics who have written on him since. -
428 BCE
Plato
Greek philosopher and teacher Plato did nothing less than found the first institution of higher learning in the Western World, establishing the Academy of Athens and cementing his own status as the most important figure in the development of western philosophical tradition. As the pupil of Socrates and the mentor to Aristotle, Plato is the connecting figure in what might be termed the great triumvirate of Greek thought in both philosophy and science. -
384 BCE
Aristotle
Aristotle is among the most important and influential thinkers and teachers in human history, often considered — alongside his mentor, Plato — to be a father of Western Philosophy.” Born in the northern part of ancient Greece, his writings and ideas on metaphysics, ethics, knowledge, and methodological inquiry are at the very root of human thought. Most philosophers who followed — both those who echoed and those who opposed his ideas — owed a direct debt to his wide-ranging influence. -
1225
Saint Thomas Aquinas
Thomas Aquinas was a 13th century Dominican friar, theologian and Doctor of the Church, born in what is known today as the Lazio region of Italy. His most important contribution to Western thought is the concept of natural theology (sometimes referred to as Thomism in tribute to his influence). This belief system holds that the existence of God is verified through reason and rational explanation, as opposed to through scripture or religious experience. -
1469
Niccolo Machiavelli
Niccolo di Bernardo dei Machiavelli is at once among the most influential and widely debated of history’s thinkers. A writer, public office-holder, and philosopher of Renaissance Italy, Machiavelli both participated in and wrote prominently on political matters, to the extent that he has even been identified by some as the father of modern political science. He is also seen as a proponent of deeply questionable — some would argue downright evil — values and ideas. -
René Descartes
A French philosopher, mathematician, and scientist, Descartes was born in France but spent 20 years of his life in the Dutch Republic. As a member of the Dutch States Army, then as the Prince of Orange and subsequently as Stadtholder (a position of national leadership in the Dutch Republic), Descartes wielded considerable intellectual influence over the period known as the Dutch Golden Age. He often distinguished himself by refuting or attempting to undo the ideas of those that came before him. -
Ralph Waldo Emerson
A Boston-born writer, philosopher, and poet, Ralph Waldo Emerson is the father of the transcendentalist movement. This was a distinctly American philosophical orientation that rejected the pressures imposed by society, materialism, and organized religion in favor of the ideals of individualism, freedom, and a personal emphasis on the soul’s relationship with the surrounding natural world. -
Kar Markx
A German-born economist, political theorist, and philosopher, Karl Marx wrote some of the most revolutionary philosophical content ever produced. Indeed, so pertinent was his writing to the human condition during his lifetime, he was exiled from his native country. This event would, however, also make it possible for his most important ideas to find a popular audience. Upon arriving in London, Marx took up work with fellow German Friedrich Engels. -
Michel Foucault
Historian, social theorist, and philosopher Michel Foucault, born in the riverfront city of Poiltiers, France, dedicated much of his teaching and writing to the examination of power and knowledge and their connection to social control. Though often identified as a postmodernist, Foucault preferred to think of himself as a critic of modernity.
