The document provides a synthesis of the major philosophies of naturalism, idealism, realism, pragmatism, and existentialism. It summarizes their main propositions regarding metaphysics, epistemology, axiology, implications for religion and education, as well as their strengths and weaknesses. The philosophies are compiled by Johny S. Natad from the book "Four Philosophies and Their Practices in Education and Religion" by Donald J. Butler.