I don't find the genetic argument convincing. There are genes we know of that seem to be related to alcoholism and/or addiction, and native Americans don't see

I don't find the genetic argument convincing. There are genes we know of that seem to be related to alcoholism and/or addiction, and native Americans don't seem to have them any more than anyone else. But that doesn't mean there aren't genes related to alcoholism we don't know about.