While in real life you hardly talk to strangers, here you get it as a social norm.

在现实生活中你几乎很少和陌生人说话，而这种事在这里成为一种社交规范。

youdao

If this "social norm" or "community benefit" source was true, why wouldn't it hold true for other animal groups?

如果这个社会规范和造福社会的来源是真实的，那么为什么对其它动物群体而言是不真实的呢？

youdao

We live in a world where criticizing people and focusing on negative attributes seems to be the social norm.

我们生活在一个这样的世界里：人们恣意批评他人，专注于消极情绪，而这些似乎成为了社会规范。 。

youdao

and that social norm is just something that's changed over time." And people share a lot.

VOA: standard.2010.07.23

The social norm of individual responsibility must be equated with purchasing health insurance.

WSJ: Ezekiel Emanuel: Health-Care Exchanges Will Need the Young Invincibles

Rather, I suspect the co-op has an implicit social norm against doing so.

FORBES: Babysitting and the Importance of Sticky Prices

If you think this social norm would be egregious, then my reply is what is your bar for sufficiently informed?

FORBES: Sometimes Not Voting is the Most Virtuous Choice