What is the main conflict in Walden Two by B. F. Skinner?

In Walden Two, B.F. Skinner makes a case for behaviorism and "social engineering" as the solution to many of the world's problems. Frazier, a psychologist interested in the practical applications of psychology to real-world problems, creates a communal social experiment called Walden Two. In the book, he leads his former colleague Professor Burris and Burris's friends through Walden Two, explaining how Frazier's theories have created a utopian society.