How does propaganda affect the opinions and actions of people and leaders during wartime?

The idea that desirable traits can be bred into human beings and undesirable ones can be bred out is known as:

How does désir represent the diversity of europe today? how did the 1400s and 1500s affect the religious diversity of europe? how might cultural diversity in a place like germany affect everyday life? what are two reasons some europeans might find immigration to be an advantage? what are two reasons some might find it to be a disadvantage? why do you think languages and culture spread more easily in europe now than in the past?

Why would be a good national slogan that people could identify with and rally behind