Skinner argued that his insights could be used to increase human well-being and:

I believe the answer is: Solve social problems

Skinner promote the idea of an utopian society where people are forced to learn and behave in one specific way. He claims that free will tend to lead to conflict between individuals by controlling the behaviour would eliminate such conflict from happening in the first place.

this is a pretty broad question and can be a pretty lengthy answer. since 1900, women have gained a lot more rights and have become active in the workforce. with women being in the workforce, men play a larger role in family life. many family tasks are shared between men and women, whereas, women used to be the sole family caretakers.

that should get you started at least.