Genetic mutation can sometimes have positive benifits but more often than not, the consequences are detrimental. A good example of this can be observed in the Amish communities of Pennsylvania where the population started with 200 settlers and endogamy is the common practice, the term used to describe this is genetic drift:
.
Evolution: Library: Genetic Drift and the Founder Effect
In order for a genetic mutation to be beneficial it needs to provide an environmental advantage to the species being changed, because of the random nature of mutation, the odds of a genetic change conforming to the environment in a way that helps is extremely small and occurs over thousands of years, not a few generations.
Then perhaps we have finally found our elusive hidden male usefulness, this thread says claims is counter productive.
Sounds like our little Amish community could be the benefactor of some of it :lol: