How can I show that later protest movements were influenced by the American Civil Rights movement?
I think that you might be well set to analyze how the Civil Rights Movements were appropriated by other social and political movements. This will help substantiate your fundamental thesis that other movements took their cues from the Civil Rights Movement. We can see this in the LGBT movements that emerged in the 1970s, most notably in Harvey Milk. When Milk talks about how he seeks to enfranchise more voices in the political discourse, he is taking a page out of the Civil Rights Playbook, which wanted to do much of the same for Black Americans in demanding a "need for the piece of the pie" in American Culture. The women's movements of the 1970s sought to address social issues through civil disobedience in much the same manner of the Civil Rights Movement, gaining strength and momentum from it. In this setting, the need to address social inequality through social demands of change is another element of the Civil Rights Movement. Finally, I think that the work of the Cesar Chavez is heavily influenced by the Civil Rights Movement. In Chavez's fight, one sees the chords of Dr. King and other leaders that sought to bring voice to a group of people who lacked voice. Taking the moral example from Gandhi, like King himself, Chavez sought to initiate peaceful change in a world that sought to deny both peace and change. In articulating the pain of others and seeking to expand the moral and ethical imagination of the cultural majority, Chavez's work is heavily influenced by Dr. King and the Civil Rights Movement.