THE DECADE of the 1960s was characterized by unusual political activism and challenge to conventional American values. It was the seedbed for many newly spawned movements. Young people and students were very much in the forefront of nearly all of them-the civil rights protests, the peace marches, communal living, women's consciousness raising, or making do with simple ("small is beautiful") technology. While claims made at the time about the "greening" of America (Reich, 1970), about the new consciousness of American youth (Haan, 1971;Slater, 1970; Yankelovich, 1969), or of a postindustrial mentality (Inglehart, 1971) appear, in retrospect, rather exorbitant, they entice questions about the lasting effects of these events and experiences on the outlook and ideology of those who came of age politically during this period.The obvious point of departure for such an inquiry is Karl Mannheim's view of a generation as a population defined by their similar location in Abstract The recollections of 28 cohorts of college graduates-all of them former recipients of Woodrow Wilson Fellowships for graduate study-of historical events between 1945 and 1971 and their participation in activities specifically associated with the peace movement and student activism of the 1960s were brought to bear on Mannheim's theory of generations. The analysis suggests proportionately greater sensitivity to the events of the 1960s among those who reached the age of 20 near the middle of the decade, a finding that bears out generational theory. But despite this apparently heightened sensitivity among those the right age at the right time, the effect of these recollections and experiences on attitudes expressed in 1973 was consistently overshadowed by even stronger attitudinal effects attributable to an early commitment to activism. The latter was more closely related to the family milieu than to having come of age politically in a particular historical period.