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
African philosophy p'Bitek, and Taban Lo Liyong, and hermeneutic philosophy, the analysis of African languages in order to find philosophical content.) In the African diaspora, American philosopher Maulana Karenga has also been notable in presenting varied definitions for understanding modern African philosophy, especially as it relates to its earliest sources. Ethnophilosophy has been used to record the beliefs found in African cultures. Such an approach treats African philosophy as consisting in a set of shared beliefs, values, categories, and assumptions that are implicit in the language, practices, and beliefs of African cultures; in short, the uniquely African worldview. As such, it is