Philosophy is the rational, abstract, and methodical consideration of reality as a whole or of basic dimensions of human existence and experience. Philosophy, which literally means “the love of wisdom,” is one of the oldest disciplines in history. There are many ideas about philosophers and what they do. Some have even considered the field to be a science that deals with logic and reason. Either way, many famous philosophers have made their contributions known to the world through their writings and their students. Below is a list of the greatest thinkers of all time along with their most important theories about human nature and ...