I dont see how a reduced ability to function socially is a next stage of anything, besides prolonged virginity/friendlessness
Well, most "social" innuendo in the modern world is just, in the cosmos of time, recent.
It's only as of recently that we, as a species, made it past the first step in Maslow's Hierarchy of Needs pyramid. With food and shelter secured, let me reiterate:
as a species, we've gone on to develop the limbic brain (emotions, social interactions, empathy, etc;). However, the reptilian brain is still there, and it WILL NEVER go away. This is the part of the brain that makes ALL important decisions and is unable to understand bullshit, ambiguity, insincere and disingenuous habits.
Scratch the surface of time and it will not take you long to reach a time in human history where and when kill or be killed and fuck your feelings was a way of life. If human A messed about with human B's food and shelter, after the fight, either human A or B would be alive to tell the story, but not both. This is how we survived as a species.
The social stuff is VERY recent and, frankly, it is going to be our doom as a species. The social stuff is the realization that the limbic brain is better than the reptilian brain. It is not. It NEVER will be. The more we fight the nature of our destiny the worst we will be.
We are farts in the cosmos of time and we know it. Our existence is solely dependent on how well we manage to pass on our gene pool. And in order for us to be able to pass on our gene pool we need to be alive. And in order for us to be alive in a world of scarce resources we need to rid of competition. It sounds savage but we are, at the very core, savages.
And this is where I connect the dots: Asperger's is basically a human being that has been able to go from step 1 to step 5 without blinking an eye. They have outsourced step two to others and could give less than a shit about step three and four:

In other words, what's not to like?