This is a conversation about American politics, so I don't think how other countries acted is relevant.
The political landscape also changes regularly - I don't think the Republicans of a few decades ago were attacking schools so vigorously, so I'm not sure going further back than that for examples is relevant either.
> efforts of left-wing people in the 60's-90's to reduce their influence on society.
Can you elaborate on this?
> Universities today, though, have a status that religious organizations have never reached. Not only being tax free but also heavily taxpayer-funded, and with a university credential being virtually required for most jobs.
I suspect that if you go back not even that long ago, you'd find religious institutions having nearly as much importance, particularly in how faiths would prevent others from joining the workforce or society itself. In any case, I wonder what % of jobs actually do require a university education these days. I would not expect a majority of them to, but maybe I'm wrong.