And Lo, on the seventh day, the Larry the Allmighty Studied, For He had An Exam the Next Day.

Have you ever wanted to play god? Will Wright has. He has created a game, in which you the player, assumes the role of creator of an entire species. A whole new race, that you get to create, change, and evolve however a person wants. It's a hit. Over a million units have been sold since sept 7th, and over 25 million creatures have been created. And it's easy to see why. Playing god has an almost universal appeal to people. So much in our own lives is far from our own control. Spore allows us to control the tiniest aspects of everything, from single celled organism to galactic civillization. It gives us power, and it's basic human nature to want that.
Maybe that's why it sold so well

http://www.1up.com/do/newsStory?cId=3170143