Thomas More’s book Utopia is basically a book on the idea of a perfect world, or at least a very healthy and prosperous world. In this book, Utopia is a very prosperous city. Everyone is happy, there are very little conflicts, and they only fight wars if they help a neighboring city fight against an invader despite the fact that they hate wars.
Was More really risking persecution by the church because of his book? In Utopia, More never undermined the church and the book was written in clear satire, so no, he was not risking persecution because of his book.