Guns, Germs and Steel
Amazon.com: Books: Guns, Germs, and Steel: The Fates of Human Societies. Been looking for books to get for my brother's birthday. I think I already got him this one, but if you don't have it you should get a copy.
It explains one of lifes biggest questions, "Why do the White men have all the cargo?" (or translated from the New Guinean), why is it that the Europeans ended up with all the money and power. A great read.