Collective social action movements, whether straightforward expressions of dissent or high-reaching attempts to change society, have been a part of American life since the nations earliest days. While protest movements are not an exclusively American phenomenon, our ability to express dissent has become a defining characteristic of our American identity, rights, and freedoms. This app accompanies the In Protest exhibition in the C.K. and Teresa Tseng Gallery at the CSUN Oviatt Library, which contains selections from Library’s Special Collections and Archives documenting dozens of distinct and significant social action movements over the course of the 20th century.