Some cultures have demonized alcohol while others have welcomed it. Modern research has confirmed that over indulgence in alcohol is bad for you but also shown that moderate drinking increases health and life expectancy. Most of the beneficial effects appear related to the heart and circulation – but not all. Recently, positive effects of alcohol have been shown for both Alzheimer’s disease and diabetes – but these are less clear cut.
http://www.science20.com/david_clark/better_brains_with_beer-175035