It's been a few years, but I remember learning about Gobekli Tepe in one of my humanities classes in college. The theory I learned is that it was a non-permanent gathering/ceremonial site (for what reason isn't exactly known), but this article neglects to mention one very interesting thing - there's trace evidence of beer at the site!

Makes you wonder what grains were used for first, beer or bread... Also the role that alcohol plays in the rise of civilization. Would these people be warring or otherwise combatitive if they didn't gather every year to drink and feast?

http://www.livescience.com/25855-stone-age-beer-brewery-disc...