How can knowledge of the events in Germany and Europe before the Nazis came to power help citizens today respond to threats of genocide and mass atrocity in the world?

The 14th amendment overruled the supreme court case of dred scott vs. sandford. the landmark supreme court case determined which of the following points? a.slaves could not be citizens b.non-landowners could not be citizens c.blacks could not be citizens d.all persons born or naturalized in the united states vary differently in citizen status.

How did political revolutions in the atlantic ocean basin affect or alter the institution of slavery and the lives of slaves

After the civil war which president was called a "carpetbagger"?