Join host John Green to learn about nonviolence and peace movements in the 20th century. What is nonviolence? What is a peace movement? Traditionally, humans often resort to violence when they come into conflict. In the 20th century, it became much more common for people to enact change by means of nonviolence, and this was a common thread of connection between many of the most notable advocates of peaceful change. Crash Course will take you along a path of nonviolent resistance and peaceful change including Gandhi, Gregg, Bayard Rustin, Martin Luther King, Jr., the Cold War , and the Arab Spring.