Philosophy was invented by the Greeks, I guess, and is a sort of formalization of our urge to try and understand ourselves and the world we live in. It gave birth to the natural sciences. These days, though, most of the action on that quest has moved to the physical and biological sciences. So is there really anything left for philosophy to worry about? Or is it as dead as Astrology? Are the speculations of ancient philosophers obsolete? I'm undecided.