It was a kind of social protest - people did not want to be discriminated because of their race or sex. This event was a precedence - nobody thought that something like this protest could occur at that time. Rosa Parks did something that made people think about tolerance and also made other people join her protest in different places.
What cartoon are you talkin about
Push factors are the example of poverty, political and religious persecution. the like of which were in Europe during the mass exodus to the new world.
Pull factors include job opportunity,education opportunity, peace and freedoms as well as higher standards of lives.