Stoicism is one of ancient Greece's most enduring philosophies. Roman Emperor Marcus Aurelius is one of its foremost figures.

The great Greek philosopher, Aristotle ... Aristotle, Politics Some people, he said, were born natural slaves and ought to be slaves under any circumstances. Other people were born to rule ...

Leucippus' ancient atomic theory bears striking parallels to the modern Big Bang model showcasing his visionary perspective on cosmic origins ...