Philosophy
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
Collections:
Religious Studies, Education, Psychology, History, Literature, Philosophy, Entire Library
...were concerned with finding the one natural element underlying all nature and being. They were followed by Heraclitus , Pythagoras , Parmenides , Leucippus , Empedocles , Anaxagoras , and Democritus , who took divergent paths in exploring the same problem...