> You could tell the story as like, alcohol puts pressure on a population to evolve better responses, and with enough time the flush evolves and that helps limi

> You could tell the story as like, alcohol puts pressure on a population to evolve better responses, and with enough time the flush evolves and that helps limit drinking. But that's pretty just-so. The "alcohol flush" reaction seems to be genetically conserved in Asia because it gives resistance to rice pathogens not because it protects against "alcoholism".