Why were civil wars common in post-colonial africa?

Why is the supreme court decision in roe v. wade so controversial.

How does the supremacy clause of the u. s. constitution affect the states? o a. it requires each state to establish a supreme court. b. it declares that the federal government can take away state powers if necessary. o c. it allows state governments to overthrow the federal government if necessary. o d. it ensures that the u. s. constitution overrules each state constitution

How did toussaint l’ouverture become a leader of the haitian colonies