通过对历史上社会问题的研究，为认识相类似的现实社会问题提供一个特殊的视角。

It can give us a special Angle of view of the similar currently social problems.

youdao

无论这是真正关心现实的社会问题，还是出于更返祖的观念——固有的、从生物学角度来说混血是错误的观念，我们只能推测。

Whether this was genuine concern for a real social problem or was born of a more atavistic notion that there is something inherently, biologically wrong with mixing RACES, we can only speculate.

youdao

但是现实生活中他们的合法权益并没有得到有效的保障和维护，从而导致了各种社会问题的产生。

But in real life their legal rights and there is no effective protection and maintenance and leading to various social problems.

youdao

Now, let's come back to the question we started with, which has to do with profits and so on in society.

现在我们来回答刚讲课时提到的问题,是与社会现实中的利润有关的问题

耶鲁公开课 - 博弈论课程节选