I once had this thought myself. Our brains evolved to deal with social grouping of a few dozen individuals at most. Now it's being heavily taxed -- not only do

I once had this thought myself. Our brains evolved to deal with social grouping of a few dozen individuals at most. Now it's being heavily taxed -- not only do we have to remember and deal with hundreds of individuals, we're no longer just comparing ourselves against others in our tribe/village, but the entire world. And the amount of rules and social conventions that need to be followed are numerous, and the pace of society is breakneck. I'd like to see a study done to see if this is the cause of the rising levels of mental health issues (or is it just more and more diagnoses)? Whenever I hear a report of someone shooting, stabbing or driving a vehicle into random strangers, I wonder whether it is someone who's been broken by the size, speed and complexity of modern life.