The other route to co-operation is reciprocal altruism of the you scratch my back and I'll scratch yours variety.

另一种合作方式是互惠利他主义，即“你帮我，我帮你”。

In fact, most people don't even agree to us in this, they believe in reciprocal altruism in the long run.

事实上，大多数人不同意这个观点，他们相信长远来看的互利主义。

And the answer is " cheater detection." Reciprocal altruism can only evolve if animals are wired up to punish cheaters.

答案是“作弊者检测”。只有当动物有能力惩罚作弊者时，互惠利他主义才能发展。

Now a lecturer at Dartmouth College in Hanover, he is eager to use New Hampshire to test libertarian theories about enlightened self-interest and reciprocal altruism, small government and large networks of voluntary institutions.

如今在汉诺威市达特茅斯学院任讲师的他，急切地想用新罕布什尔州测试自由主义中，关于开明利己主义、互利主义、小型政府和庞大志愿组织网络等理论。