View Single Post
Old 02-27-2017, 06:14 AM
Mangetout Mangetout is offline
Charter Member
Join Date: May 2001
Location: England
Posts: 57,106
Originally Posted by View Post

None of those examples you gave interfere with the sexual reproduction abilities of the people involved, nor do they kill off their children before they reach reproduction age.

So evolution doesn't care about those minor items.
Selection doesn't have to be boolean kill/survive- it can operate at a statistical advantage/disadvantage level and still drive evolution in a population - for example, for a trait to decline in a population, it doesn't need to *kill* babies - it only needs to reduce the average capacity for having surviving children by a percentage (rather than an increase in infant mortality, which would be more conspicuous)