[leftyted]

> I feel like human behavior will change as culture evolves.

In some ways it will but in other ways it won't. There are many patterns of human behavior that have not changed, ever, as far as we know.

> How do you conduct science when whatever important truth about human behavior you find invalidates the same findings once that knowledge enters popular culture?

I don't think this is the problem.

I think the problem is that we don't have a theory of the mind and therefore psychology is a field where only erudition is possible. I don't consider psychology, or other "social sciences," scientific. These fields generally lack predictive power and tend to be necessarily qualitative. That's not to say that they're useless but it's an important distinction.

I don't think it's clear that we'll ever have a good theory of the mind. Maybe understanding your own mind is like jumping over your own shadow. How can you understand the thing that allows you to understand?