Facebook friends and survival of the twittest

Demographer Bernard Salt writes he is always impressed by the academic work of evolutionary psychologists, who attribute human behaviour to survival skills.Over eons, humankind has evolved with an inbuilt sense of what is needed to survive, procreate and prosper. The most recent application of this thinking has been in the development of theories on the need for friends.Studies show that people who are connected to other people are happier, more resilient – and live longer.As a general rule, I would have thought that women have more friends than men – and I wonder whether this is a factor in women’s greater longevity.But why are people with friends better survivors than loners?

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