[O]ver the past few decades, the quality of human sperm has declined massively... Pollution... is one possible factor. Another might be stress... tri… - Henry Gee

It's evident that Darwin saw evolution not as progressive or improving, but as an activity that happens moment by moment. From this it is clear that evolution has no plan. It has neither memory nor foresight. No vestige of cosmic strivings from some remote beginning; no prospect of revelatory culmination in some transcendent end.

The cause of extinction is usually a delayed reaction to habitat loss. ...H. sapiens might ...already be a dead species walking.

There is more genetic variation in a few troupes of wild chimpanzees than in the entire human population. Lack of genetic variation is never good for species survival.