After most of the world's atomic weapons are detonated around the world, even if the planet's population was the same as it was 4,000 years ago, the population of nuclear holocaust survivors might be spread so sparsely there might not be enough genetic diversity, from inbreeding. Rampage
A very fair assumption. But I "speculate", because in the Past years more people have been able to "see" the world and commutate with others, I just wonder if that "Human" spirit that is in most of us will prevail".
I watched a very interesting program last night about "Georgia" which gained independence in 1991 with the fall of the U.S.S.R. It had a similar occurrence as now Ukraine has in that Russia tried to invade and set up Russian led government in two areas. At that time when President Bush was your leader, Georgia wanted to join N.A.T.O. with the Ukraine but, and I find this striking, Germany was against both joining at the time. A compromise was reached where upon Germany agree they could join in the future, which Russia used to continue to try to "get round".
Angela Ripen, then while she was in power, "cosied up to Russia" and formed a close relationship. So what we are seeing today with invasion of Ukraine is a total lack by the then Chancellor of Germany and the West, to understand the Dangers of forming any relationship with in this case Russia i.e. Putin because he was and still is a form of "a Single minded mental unbalance person".