During the 1960s, there were many, many influential women. These include everyone from singers and entertainers (like Joan Baez and Jane Fonda) to writers (like Erma Bombeck) to politicians in America and elsewhere (Bella Abzug, Shirley Chisholm, Golda Meir). Because there is such a wide range of women, I think there is very little that you can say they have in common. To me, the only real common thread here is that all of these women were more assertive than their societies thought women should be.
During the '60s, there was still a pretty strong attitude that women should be somewhat subordinate to men and that their lives should be somewhat private and controlled. In contrast to this expectation, the women who became intellectual all spoke out aggressively. All of them put themselves out in public and demanded to be heard. I think this is the major attribute they had in common.