Here's a fantastic lecture by Jared "Guns, Germs and Steel" Diamond at the USC College Center for Religion and Civic Culture on the "evolution of religion" -- the evolutionary forces that shape religions and cause some to prevail and others to wane.
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.