Have the 'elites' really changed much?

 Here's a deep dive into David Brooks' Bohos/Bobos thesis - this time from Peter Levine. 

Levine is tempted to agree with Brooks but a close look at the data told him otherwise.

"It is true that elites have become somewhat more liberal since 2000, but the changes are small. Overall, elites were more liberal than non-elites in the 1970s and still are today. (To be sure, what it means to be “liberal” has changed, but this is still a reason to doubt a story of ideological realignment.)"