Here’s another reason for the docility of the post-60s generations: they’ve had more schooling, and a study of people who quit smoking shows that educated people are more easily influenced by others.
That makes sense. The point of schooling is to hook people into the system of official attitude and belief rather than leaving them to their own devices. So the more schooling there is, and the more society becomes an educational meritocracy, the more people will accept whatever the official line happens to be. To reject it is to join the ranks of the uneducated, irrational, and low class.
UPDATE: An example of the effect of formal education on beliefs and attitudes: people with more of it are much less likely to say that blacks are poorer because they have less innate learning ability. Only 2.8% of those with graduate degrees, as opposed to 20.2% of high school dropouts, say that lesser black prosperity is due to lesser black learning ability. It’s not clear just what the question was, though, and in an area like this exact wording could matter a great deal.