For example, being obsessively careful would help you survive when drunk, as then you'd only be moderately careful.... whereas a normal person goes from moderat

For example, being obsessively careful would help you survive when drunk, as then you'd only be moderately careful.... whereas a normal person goes from moderately careful to careless when drunk. That's what I mean by "being drunk all the time having an evolutionary impact" - I wonder if this could explain being obsessive or overcautious. That is, mild forms of OCD existing as an adaptation to an alcohol-rich environment.