“There’s definitely something happening,” said Peter W. Wood, executive director of the National Association of Scholars, which was created in 1987 to counter attacks on Western culture and values. “I hear from quite a few faculty members and graduate students from around the country. They are not really interested in fighting the battles that have been fought over the last 20 years.”

Individual colleges and organizations like the American Association of University Professors are already bracing for what has been labeled the graying of the faculty. More than 54 percent of full-time faculty members in the United States were older than 50 in 2005, compared with 22.5 percent in 1969. How many will actually retire in the next decade or so depends on personal preferences and health, as well as how their pensions fare in the financial markets.

Yet already there are signs that the intense passions and polemics that roiled campuses during the past couple of decades have begun to fade. At Stanford a divided anthropology department reunited last year after a bitter split in 1998 broke it into two entities, one focusing on culture, the other on biology. At Amherst, where military recruiters were kicked out in 1987, students crammed into a lecture hall this year to listen as alumni who served in Iraq urged them to join the military.

In general, information on professors’ political and ideological leanings tends to be scarce. But a new study of the social and political views of American professors by Neil Gross at the University of British Columbia and Solon Simmons at George Mason University found that the notion of a generational divide is more than a glancing impression. “Self-described liberals are most common within the ranks of those professors aged 50-64, who were teenagers or young adults in the 1960s,” they wrote, making up just under 50 percent. At the same time, the youngest group, ages 26 to 35, contains the highest percentage of moderates, some 60 percent, and the lowest percentage of liberals, just under a third.

When it comes to those who consider themselves “liberal activists,” 17.2 percent of the 50-64 age group take up the banner compared with only 1.3 percent of professors 35 and younger.