Futureproof Extra: The Kindness of Strangers

Have you ever given money to charity, or volunteered your services to an aid organisation or even donated a kidney to someone on a transplant waiting list? 
What makes people commit such acts of kindness, especially towards complete strangers? 
Well kindness “is as bred in our bones as our anger or our lust or our grief or as our desire for revenge", that is according to Michael McCullough, Professor of Psychology at the University of California San Diego & author of ‘Kindness of Strangers: How a Selfish Ape Invented a New Moral Code’.
He joined Jonathan to discuss.
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