Which of the following did the Supreme Court invalidate in Dred Scott v. Sandford?

Interest groups are critical players in established democracies and in countries that are becoming democratic

Indicate whether this statement is true or false.

Hutu–Tutsi strife in Rwanda, Sinhalese–Tamil tension in Sri Lanka, and Tuareg in Mali are examples of civil conflict due to ________

a. ethnic diversity b. poverty c. unemployment d. Maoist intellectualism e. imperialism