Schwartz Between the Galaxies, by Robert Silverberg

Not much on this one, as I just couldn't stay engaged. Silverberg is trying to take on questions of cultural diversity versus the ultimate unity of mankind. His vehicle is Schwartz, a lecturer on the subject. The aliens in the story are a fantasy device of his, ending up drug-induced, I think. Meh. Schwartz Between the Galaxies is just OK. Again, better read than heard.