Epistemology - study of the nature of knowledge. Existentialism - philosophy of being/existence.
, was an editor of the Spanish individualist anarchist magazine La Revista Blanca who later achieved infamy when as an important member of the CNT-FAI w..
The philosopher William James in his book Pragmatism (1907) wrote about the world-riddle, as follows: [From Pragmatism (Lecture VII) by William James..
Ernst Haeckel, The Riddle of the Universe (Die Welträthsel or Die Weltraetsel, 1895–1899), Publisher: Prometheus Books, Buffalo, NY, 1992, reprint..
In Beyond Good and Evil Nietzsche criticizes the concept of free will both negatively and positively.http://archive.org/stream/beyondgoodandevi00nietuof..