Where Does Morality Come From?

Time is the most familiar thing in the world, and yet philosophically one of the most puzzling. Is the present what’s left when you subtract what has already happened, and what is yet to happen? Then it seems to vanish into a mere instant.  Are future events completely unreal? Or are they just the things we can’t know yet? Is time unreal, as many philosophers have thought? Columbia’s Dave Albert joins John and Ken for a fascinating hour.