The social brain hypothesis suggests that our intelligence evolved to manage our complex social lives.

社会大脑假说认为，我们的智力进化是为了管理复杂的社会生活。

Our minds are not designed to cope with the anonymity of modern urban life.

我们的思维并非为应对现代城市生活的匿名性而设计。

Friendship is a matter of time investment.

友谊是时间投资的问题。

The bigger the brain, the more complex the social world it can manage.

大脑越大，它能管理的社会世界就越复杂。

Religion is the price we pay for having a large brain.

宗教是我们为拥有大脑付出的代价。

Laughter is a mechanism to bond large groups.

笑是一种连接大群体的机制。

The human brain is a social brain, and it evolved to deal with social relationships.

人类大脑是社交大脑，它的进化是为了处理社会关系。

We are the product of our evolutionary past.

我们是进化历史的产物。

Language evolved to allow us to gossip.

语言的进化是为了让我们能够闲聊。

The magic number 150 suggests that the size of our social networks is limited by the size of our brains.

神奇数字150表明，我们社交网络的规模受限于大脑的容量。