Seemingly, some thousands of years ago, several individuals combined, or perceived their combination and therein created Man.

This creation was, and is, a concept; a thought or idea, neither right or wrong (left) but a way among ways.

For the better part of the interim then, men played with Man making love, fire, food, mores, children, Gods, language, tools, wastes, etc: combinations of divers sorts, in almost as many directions (purposes). Now people come and people go, but always as people, no longer as individuals from which people had risen (or succumb). Almost as frequently as people come and go, additional, more distant concepts (from whatever reality is the individual/that precedes them); families, clans, tribes, villages, towns, cities, states, and civilizations make their brief passages and then leave the scene.

These various combinations of Man with teir various concepts of themselves invented war in order that any singular combination might achieve dominance over other combinations. This came to pass as Man attempts to preempt those rights of the individual. The individual remembers reality only in learned (rather than the original and innate, therefore false) responses to right (his combinations values) and wrong (other combinations values differing from his own.)

History is the study of these combinations.

As a matter of record, therefore, some 2400+ years ago, Socrates, and individual, addressed himself to an evolving concept called knowledge. Knowledge is again a way to conceive, but conception is enlarged through rules less combination specific. Philosophy, remote as ever, is slowly displaced by science (mathematics, medicine, astronomy, etc.), a disciplines observing the singular rule that a fact becomes knowledge when it can be proved.