I think you're missing the point. Fitness in this sense has nothing to do with right or wrong or validity. Those examples you gave could be quite "fit" relati

I think you're missing the point. Fitness in this sense has nothing to do with right or wrong or validity. Those examples you gave could be quite "fit" relative to other choices, and thus survive for a good while. Basically we're talking more about genes and memes, fitness is whatever occasional mutation actually perpetuates, in the particular context/environment. Social behavior is partly memetic, and partly genetic.