Everything you need to understand or teach Cities in Flight by James Blish.
To a very great extent, Blish's social concerns are his great theme in Cities in Flight. America, he suggests, is at a crossroads. Western civilization is wearing out in a very real sense and is about to be replaced by something new, what Blish rather clumsily labels Earthmanist Culture. Through the four books of the tetralogy readers see this culture grow, pass through the various stages predicted by Spengler and then itself begin...