Put this together with Pew Research and Gallop and you can mix in all the other nonsense that is thrown at us today.

it never really stops, well eventually.

No but we have to find ways of dealing with the damaging effects of that, which are considerable.

The reason being, that no animal can pre-adapt to a new or changed environment, if a creature, from Africa, say, should find itself washed out to sea, and having survived the crossing, lands on the shores of South America, it is unlikely to be well adapted. Few animals however have had such a dramatic and sudden change of environment as humans, when only a few million years ago, we developed language. Which was at the time, no doubt, a useful tool and a great aid. But it brought with it the possibility to create culture, and probably the inevitability of that act. So that we suddenly changed from being an animal living in a natural environment to which we were adapted, to being an animal living in a cultural environment, for which we were almost completely ill fitted. The first great mismatch.

Hence the reason why we so prone to being manipulated by parts of our own culture, like religion, nationalism etc. and why agriculture, gives us super abundant foods, which we can not eat and remain healthy, religion, gives us a super abundance of stories that we can not pick the truth out of, and the media gives us a super abundance of human contact which we can not befriend all of, and so we become hostile.