You can have a city, sure, as long as the different buildings are still interdependent. No discipline is (or should be) an island, after all. (My lone psychology building would be pretty ugly and unstable after a while.)
Sure - but that interdependence should only follow from what the different branches happen to actually need from one another, and NOT from a preconceived notion about how they SHOULD be related. (eg. "Science should talk about brain chemicals or evolution.")
I don't much care for Adorno's favorite art, either. And I don't much care for Adorno. I was just giving a survey of the territory.