What were the main causes of migration in the late eighteenth and early nineteenth centuries ?

The second significant cause of the Great Migration was the desire of black Southerners to escape segregation, known euphemistically as Jim Crow. Rural African American Southerners believed that segregation - and racism and prejudice against blacks - was significantly less intense in the North.Jul 2, 2016

yes

explanation:

the fighting words doctrine, in united states constitutional law, is a limitation to freedom of speech as protected by the first amendment to the united states constitution. in 1942, the u.s. supreme court established the doctrine by a 9–0 decision in chaplinsky v. new hampshire.

the communist manifesto is an 1848 political pamphlet by the german near the end of the manifesto, the authors call for a "forcible overthrow of all existing social conditions",  ..