The fossil record shows a break between the australopithecines, supposedly directly ancestral to our genus, and the first humanlike members of the genus.
The standard evolutionary account of human origins holds that our population has always been in the thousands and humanity did not descend from an initial pair.
Their scrupulous work found that Jerry Coyne and others, in bullying Christians and Jews on how “we can dismiss a physical Adam and Eve with near scientific certainty,” were in reality poorly supported.
Could humanity have had its origin in a first pair, or did it have to come from a population of at least several thousand?
A bottleneck of two, or a first pair at our origin older than 500,000 years, is possible.