The American people seem to be in a mood also for a return to the grand isolation of the twenties. They are enjoying unprecedented prosperity, but they are handicapped in their enjoyment of it by the demands of the struggle to stop communism and build peace. This mood is most concretely expressed in the complaints about taxes and the Korean conflict. Many who voted for the change are worried about communism, but they want to fight it the easy and inexpensive way--the phony way of Senator Eugene J. McCarthy.