I've always believed based on my reading that alcohol was discovered and "brewed" prior to the agricultural revolution. Of course, it was probably only 3-4% alcohol.
This study supports that, but more importantly, suggests that grains may have actually been first cultivated not to serve as a major food source, but instead for fermentation purposes.
Happy St. Paddy's Day:
Brewing during the paleo period: What Was Brewing in the Natufian? An Archaeological Assessment of Brewing Technology in the Epipaleolithic - Springer
My write up on early humans and grain cultivation: http://jasoncholewa.com/2013/02/08/e...d-your-health/
Jason Cholewa, Ph.D., CSCS