In the distant past, the ancestors of everyone alive had had great survival skills and were good at breeding - it was a case of: 'the survival of the fittest'.
Nowadays, in more enlightened and kinder times we have fertility clinics, social benefits and advanced medical care to ensure that almost all survive.
One wonders if, ultimately, this will actually be of any benefit to the long-term survival of our species. Can we prevail against the selfish gene of evolution . . and should we ?