Re: Excellent points
You're right about the orangutans. At least some social tendencies are essential for civilization, division of labor, and other things. Nobody wants to be Robinson Crusoe. It says something for our species that we can live in cities of millions of people on top of each other and that violence is as rare as it is (percentage wise).
I don't think you're using term "collectivism" correctly, or at least how I've seen it used. Collectivism implies subservience of the individual to a group. I like the term "cooperation." The latter is possible and desirable for free people (even Galt's Gulch had division of labor).