Which factor has been a major cause of mass migrations during the modern era?

Explanation:

In the preindustrial era, environmental factors like droughts, natural disasters, and climate all influenced human decisions about where to migrate.

b

make me

so they can differentiate themselves from others as they saw themselves as the superior race. the star was basically a symbol that meant you are a less of a person than i am because of my race. the star was also degrading for those who had to wear it because they were aware of this and the nazis used the notion to make them feel less like a person.