Sailerian Speculation on Alcohol and Civilization

"It's fairly obvious that when alcohol first hits a human population, whether Middle Easterners in the time of Noah and Lot or aboriginal populations in the New World, Pacific, and Australia in more recent times, it takes a terrible toll until gene frequencies and/or cultural traditions better suited for dealing with liquor emerge," begins Steve Sailer — Evolutionary impact of alcohol? He speculates:

What if the invention of alcohol allowed a single genome to exhibit different personalities at different times? Germans, say, could thus evolve personalities making them tend to be intense worrywarts, propelling their society into a model of technical competence. But who wants to be around other neurotics all the time? Yet, a couple of beers after work could allow the same Germans to turn into amiable, temporarily carefree companions, making social bonding more feasible.

Or the Japanese could evolve to be so intensely sensitive to the feelings of other Japanese that their culture becomes a byword for courtesy and politely vague conversations that don't hurt anybody's feelings or convey much explicit information. Yet, after a couple of shots of sake at one of their countless boys' nights out, the salaryman might suddenly feel free to tell his boss exactly how he's screwing up next year's sales forecast.

Or the Koreans could evolve to be so intensely sensitive to relationships with other Koreans that it becomes almost impossible for two Koreans without a common familial or academic bond to comfortably communicate with each other without a drink or two, after which, a relationship may be born.