On whether technology has influenced the seeming rise in mental health issues: The concept of technology as separate than Nature is impossible to pin down, but to say that a lifetime of social pressures, advertising, television, and processed and genetically altered foodstuffs would not affect what the brain is used to, and what is was designed to do, is a non sequitur. Certainly an entirely separate set of influences also had negative consequences in the brains' of pre-man, but these were not of his own making, as he still lived in an organic environment, and therefore wasn't a part of the "feedback loop" we have going on with humans becoming the products of a man-made environment (one of the only things that sets us apart from most the animal kingdom). Either way, whatever you're doing you're getting better at it, so with the increase in time spent on the web and watching TV we are increasingly better at watching other people - being passive, non-accountable, constantly comparative and self-obsessed, impotent in light of the mass of information constantly flooding towards you - which the brain was not originally intended for. This seems obvious. So the fact that some people have things like crippling anxiety and OCD, or develop anti-social disorders and the like, seems like a logical result produced by a system (the brain) presented with new and inorganic conditions. On top of that, being a non-douche is naturally and evolutionarily based because it increases the likelihood that others will want to chilll'n'stuff and help you when you need it, but when transposed onto a crowded, fast-paced modernity it twists into something like flattery and competition to appear the most altruistic.