I'm not sure it suggests that society is stratifying, though. People didn't go to college nearly so much prior to the 70s. Once college became ubiquitous, I wou

I'm not sure it suggests that society is stratifying, though. People didn't go to college nearly so much prior to the 70s. Once college became ubiquitous, I would expect that the number of people who's parents went to college could have to go up no matter what. ie, there is a smaller and smaller pool of people who's parents did not go to college since the 1970s. I'm not even suggesting that society is not stratifying; I just don't think this is proof of it.