Homosexuality and Evolution

Some inferences from E.O. Wilson's latest work:

With all necessary caveats against reductionism and misappropriation, we can ask: should human societies conceive of themselves in terms of  group-level selection? Have we already developed aspects of eusociality? And -- just to make matters really interesting -- could non-reproducing humans, such as (most) gays and lesbians, as well as heterosexuals who choose not to have kids, actually be a manifestation of this emergent eusociality?