Another factor when it comes to evolution is that it doesn't care much what happens to us when we get old. If it can trade increased fitness during our reproduc

Another factor when it comes to evolution is that it doesn't care much what happens to us when we get old. If it can trade increased fitness during our reproductive primes for a lot of aches and pains in our 40s, it will happily accept. You don't hear too many 16-25 year olds complaining about inflammation.