Comment Re:Of course it did (Score 4, Insightful) 89
Anyone who has woken up next to someone they hooked up with while drunk can tell you that alcohol completely undermines selective breeding.
Funny -- TFA actually argues that "being a cheap date" was a disadvantage and selected against:
"If you were the ancestor without this new mutation in ADH4 [to metabolize alcohol], the ethanol would quickly build up in your blood and you'd get inebriated much faster," Carrigan says. "You'd be a cheap date." This easy inebriation, he says, would have been a disadvantage to the monkeys without the mutation, making them more easily get sickâ"or drunkâ"off fruit, enough so that they couldn't defend their territory and seek out food. Primates with the new mutation could get more food, his group hypothesizes, and the gene was selected for in the human and chimpanzee lineage.
But then the next paragraph makes a 180-degree turn and claims that alcoholism evolved to be associated with pleasure because, I guess, being drunk is fun (and, apparently, tasty). So, apparently "being a cheap date" is also something that is selected FOR in evolution, or alcoholism doesn't evolve, accroding to TFA:
Carrigan says the discovery might explain why human brains evolved to link pleasure pathways with alcohol consumptionâ"ethanol was associated with a key food source. "It's not a whole lot different from the addictions some people have towards food," he explains. "At the right dose, when you didn't have alcohol and candy at every corner, it was hard to get too much of this sort of stuff, so when you found it, you wanted to be programmed to overconsume."
Argh. Wasn't it just yesterday that I was complaining about evolutionary biologists making up random "just-so" stories that conveniently show how anything could evolve?
In TFA, wanting to get drunk is bad for natural selection, until it's good for natural selection... in the freakin' next paragraph. Really, guys?