Husband was telling me about some research that has been done into mammals whose females live long after they are of offspring-bearing age. That includes humans, of course, plus elephants and whales.
The most popular explanation is the 'Granny effect.' Meaning the older females are needed to help look after the young who need nurturing for longer than other animals.
We have evolved to become grannies. Let me write that again: grannies are at a higher stage of evolution than the rest of the population. Well, that's my take on it. I assume that includes any older women not just those fortunate enough to be grannies.
No offence to all you men out there but some of us are just further up the chain.
P.S. I've just discovered the Granny effect was first suggested as far back as 1966. And I might have made a joke of it but scientific research has proven that grannies are good for you.
Me with my mum, great-gran and gran. We all lived in the same house, along with my grandfather, and my gran was mostly responsible for my every-day upbringing as my mum had to go out to work. My gran was a formidable woman; she wouldn't have had any trouble complaining to a solicitor.