David Brooks describes the bourgeois-bohemian "bobos" as the new establishment. They are the metropolitan liberal elite of the 1990s who replaced the "yuppies of the 1980s," mixing traditional establishment values with the counterculture of the 1960s.
Brooks identifies the rise of this new upper class as a product of the information age, in which knowledge and creativity are of such vital importance to the economy that the establishment has to include a strong liberal, artistic element. The bobos tend to be educated at the elite universities which have recently been at the forefront of social justice activism and where the faculty members, always left-leaning, have moved further to the left in recent decades.
Brooks charts the increase in egalitarianism in Ivy League universities beginning in the 1950s, pointing out that recent graduates are likely to have better academic records, less patrician backgrounds, and more liberal outlooks than their predecessors.
Brooks makes a good case for bobo culture as one of the defining features of our age, but it has clearly not infiltrated all fields to the same extent. The current political administration has nothing "boho" about it, with a president who is very obviously a product of 1980s corporate culture rather than the more bohemian 1990s.
The establishment in academia, the media, Hollywood and some parts of Silicon Valley is very clearly defined and dominated by "bohos." The political and diplomatic establishment, banking and manufacturing are not. The establishment, therefore, is divided to an extent that is probably unique in American history.