I don't think social behaviors enter into it. Regardless of how one socializes, it's possible to derive happiness from doing things alone. Just because I derive

I don't think social behaviors enter into it. Regardless of how one socializes, it's possible to derive happiness from doing things alone. Just because I derive happiness from doing things with friends doesn't mean I don't ALSO derive happiness from purely internal things. There certainly are long term consequences involved with complete isolation, but that's not really in question, I don't think.