In the 1970s, Chicano identity became further defined under a reverence for machismo while also maintaining the values of their original platform, exemplified via the language employed in court cases such as Montez v. Superior Court, 1970, which defined the Chicano community as unified under "a commonality of ideals and "costumbres" with respect to masculinity (machismo), family roles, child discipline, religious values." Oscar Zeta Acosta defined machismo as the source of Chicano identity, claiming that this "instinctual and mystical source of manhood, honor and pride... alone justifies all behavior." Armando Rendón wrote in "Chicano Manifesto" (1971) that machismo was "in fact an underlying drive of the gathering identification of Mexican Americans... the essence of "machismo", of being "macho", is as much a symbolic principle for the Chicano revolt as it is a guideline for family life."