Letters on the English author of "Novum Organum" and father of experimental philosophy. Letter 13 is about John Locke and his theories on the immortality of the soul. Letter 14 compares British philosopher Isaac Newton to French philosopher René Descartes. Upon his death in 1727, Newton was compared to Descartes in a eulogy performed by French philosopher Fontenelle. While the British did not appreciate this comparison, Voltaire argues that Descartes, too, was a great philosopher and mathematician. Letter 15 focuses on Newton's law of universal gravitation. Letter 16 talks about Newton's work with optics. Letter 17 discusses Newton's work with geometry and his theories
20th-century French philosophy Situationists etc. at the protests as well. Each of these events have shaped the content as well as the form of the writing of these French philosophers. Time and again, the movements have questioned the French state, the university, imperialism and capitalism as well. This has provided impetus, material and structural change to the current of French philosophy consistently. 20th-century French philosophy 20th-century French philosophy is a strand of contemporary philosophy generally associated with post-World War II French thinkers, although it is directly influenced by previous philosophical movements. The work of Henri Bergson (1859–1941) is often considered the division point