From flickr user Bob B. Brown under a Creative Commons License

Wired writer Jonah Lehrer theorizes on why people who drink live longer (since we don’t brew beer to include antibiotics anymore).  Study after study has proven it so, but why?  As it turns out, it may not be the physiological effects of a drink, but the psychological and sociological.

But drinking isn’t just about de-stressing. In fact, the cultural traditions surrounding alcohol tend to emphasize a second, and perhaps even more important, function: socializing. For as long people have been fermenting things, they’ve been transforming the yeasty run-off into excuses for big parties. From Babylonian harvest festivals to the bacchanalias of Ancient Greece, alcohol has always been entangled with our get togethers. This is for obvious reasons: Alcohol is a delightful social lubricant, a liquid drug that is particularly good at erasing our inter-personal anxieties. And this might help explain why, according to the new study, moderate drinkers have more friends and higher quality “friend support” than abstainers. They’re also more likely to be married.

What does this have to do with longevity? In recent years, sociologists and epidemiologists have begun studying the long-term effects of loneliness. It turns out to be really dangerous. We are social primates, and when we’re cut off from the social network, we are more likely to die from just about everything (but especially heart disease). At this point, the link between abstinence and social isolation is merely hypothetical. But given the extensive history of group drinking – it’s what we do when we come together – it seems likely that drinking in moderation makes it easier for us develop and nurture relationships. And it these relationships that help keep us alive.

Drink beer, have fun, live longer: a simple and fantastic product of human evolution.