Where do governments get legitimacy & authority?

This lesson discusses the concepts of legitimacy, authority, order, and liberty as part of a greater lecture series on the Democratic Republic of the United States.
This video is part of a larger series of lectures originally created for a lower lower-division Introduction to Political Science college course (100/101), but is suitable for High School U.S. Government or anyone who wants to learn more about the fundamental concepts of political science and government.