Biologists call that reciprocal altruism. OK.

like patriotism, or altruism, or religion to practices

It's on altruism and chimpanzees, where the question is

And that's why it's the most powerful form of altruism.

like love and kindness and happiness and altruism and ideas.

And we find chimps are capable of true compassion and altruism.

But this wasn't really altruism just interest in doing something cool.

The mother is the model of all altruism for human beings, in spiritual traditions.

It's a form, if you like, of ecological altruism perhaps something along those lines.

Our generosity, our altruism, our compassion, are all hardwired to the reward mechanism in our brain.

In chimpanzee society, we find many, many examples of compassion, precursors to love and true altruism.

We looked at smoking and drinking behavior, and voting behavior, and divorce which can spread and altruism.

Fortunately, more and more people are understanding this idea, and the result is a growing movement effective altruism.

It's the opposite on the left side more tendency to altruism, to happiness, to express, and curiosity and so forth.

So, I would say that what seems sometimes to be altruism, in relation to Africa, or in relation to developing countries, is more than that.

And I think that's why many of the most significant people in effective altruism have been people who have had backgrounds in philosophy or economics or math.

And Holly Morgan told me that she used to battle depression until she got involved with effective altruism, and now is one of the happiest people she knows.

Now none of these companies are doing this out of altruism they're doing it because they're learning that a certain kind of sharing is in their self interest.

Again, I know this is not as inspiring a notion of compassion as you may have heard in the past, but from a biologist's point of view, this reciprocal altruism kind of compassion is ultimately self serving too.

They're enriching others, not out of altruism but as a way of enriching themselves. eBay solved the prisoner's dilemma and created a market where none would have existed by creating a feedback mechanism that turns a prisoner's dilemma game into an assurance game.

Now, there's one other result of this dynamic called reciprocal altruism, which I think is kind of good news, which is that the way that this is played out in the human species, it has given people an intuitive appreciation of the golden rule.

Friendship, altruism, compassion, service all the perennial truths that we talked about that are part of all religion and all cultures once you stop trying to see the differences, these are the things in our own self interest, because they free us from our suffering and from disease.