In the late 1960s, several leftist political movements in Latin America began to claim the use of political violence as a means of social transformation. This second wave of leftist political violence was distinct from an earlier wave—composed of rural guerillas inspired by the Cuban Revolution, roughly a decade and a half earlier—in several ways. The later proponents of armed struggle emphasized the importance of cities in armed actions, not just rural settings. They also advocated interaction between armed organizations and other actors in social movements, including far-left nationalist and populist factions within traditional political parties and the Catholic Church. Armed action was seen by such groups as a valid response to increasingly repressive governments, and to limitations on political action that made social change through peaceful means impossible. The use of violence provided a way to develop collective action in the hostile environment of the Latin American Cold War, which was marked by extreme political and ideological polarization.