[hackrmn]

I think a fundamental and flawed assumption in your general line of argument boils down to that line:

> Social people will be fine

Thing is, "social" is not only a scale, it's not even a line for scale. It's this multidimensional space of different social preferences and different preferences as to _how_ to socialise, not to mention with whom and for what reason. In short, it's much more complicated than as to permit a "binary" division into the "social" and "other" people, but even if you did, I would wager the division puts it at 50% for either group, meaning you're basically describing a cataclysmic event where 50% of the population suddenly has no access to a fundamental trait of humanity that in known and unknown ways has assured our feeling of happiness and warded off a plethora of conditions of misery and worse that psychology has no names for (and won't ever have names for because that's like classifying different gradations of drinkable water, I imagine).

But yeah, humanity has always had to evolve, it's just that these changes come too fast for our adaptability to adapt to, I believe.