In a new spin to the “Random Mutations and Natural Selection produces all the wonderful things we see around us” belief system, mature aged geneticist (of “I’ve spent a long time working on snails, although I have now moved into slugs” fame) Steve Jones of England seems to harp back to the days when old men like him could get a young girl, and half the children died in their youth. Social Darwinism comes out with another great contribution to the welfare of our society.
If human evolution has been driven by fathers being over 35, there would have been little or no evolution during times when life expectancy was under 35. The science community generally believes life expectancy for most of human history was pretty short – less than 35 years. Thus human evolution should only have occurred when social conditions improved enough to support longer lifespans. Doesn’t that push evolution into the period of recorded history? A period when no human evolution has been observed?
In fact, are not older fathers much more likely, because of mutations, to produce children that suffer defects producing children that are less fit?