Just thinkin….
It was a make or break decade for mankind when ‘The Pill’ and other such contraceptives became commonly available. Up until that point mankind had reproduced the species because they liked sex. It was no done deal that they would continue to reproduce when they realised how to break the link to pregnancy. I guess it turned out that we had developed a culture of family and love of children which meant that people actually reproduced because they liked not only sex, but children too. I guess it wouldn’t take a lot for that culture to shift and for people to consider children to be a poor life choice, and then we reach the end of our evolutionary path, some other less sentient creature will rise to the top in our absence.

Advertisement