Also worth pointing out that many of that "radical" generation, also were implicitly patriarchal ie male dominated.
Whilst notionally about liberation and equality, this was always what men (mainly immature boys) thought was liberating. ie having lots of sex with women who of course would comply.
And I think as immature boy men, really had not ability to understand (unless they had been subjected to child abuse) that there should be an age limit. And also of course, many young girls who followed bands or even groovy revolutionaries, didn't go because they wanted sex, but would (sadly) not feel able to say no. ie the culture pressure to fit in with dominant alternative culture, was that women / girls should be available.
It was this implicity sexist atmosphere that led to what was really the first Women's Liberation Conference at Essex University in 68 or 69.
But also what led to Spare Rib being set up. And as said up thread it was never radical feminist, as it was more a journalist project and just as is the case now, media feminism, has very little to do with grass roots or activists feminism.
The sexism of the alternative culture was one of the biggest motivations for women to realise they needed to have their own Liberation Movement, because it was clear, they would never have a voice, or be part of some general Liberation movement if it was dominated by men.
The bonus of that period of time was that it was really common for people whatever region, class, etc., to assume it was possible to start up a group or whatever and not look around for leaders to tell them what to say or think.
Added to which as discussed up thread, communication that was more than local was not as easy as it is post internet.
And in fact when the first Women's Liberation Movement Newsletter started to be distributed some felt it was little more that an attempt by women in London to "take over" the Movement!