The infamous book, Utopia, proposed many controversial ideas. More definitely was risking persecution from the Catholic Church because everything referring to religion in Utopia was contrary to the Church’s beliefs.
The Utopian system of religion was established by the island’s founder, General Utopus, and allowed tolerance of all theological beliefs, aside from atheism (apparently you had to believe something other than nothing), which was contradictory to every Catholic teaching because Catholicism was the only possible belief. Most islanders believed in a single all-powerful deity but disagreed on who (or what) he (or she or it) was. Some claimed that their god was an idol, a person (usually somebody no longer around), or a celestial body. The common name for this all-powerful entity was Mithras. Because every family had a different god, the churches did not display pictures of any deity. The church services of Utopia did not have any pomp or color and were generally drab while the Catholic mass was very bright. The church of the European world had daily services, exactly opposite of the Utopian service calendar consisting of one service at the beginning and end of each month and year. Also contrary to the Catholic teachings were the priests themselves. The Utopian priests were few in number and celebrated no sacraments. The Catholic priests on the other hand, were many in number and preformed seven sacraments often. Contradicting all Catholic beliefs, the religious system of Utopia tolerated every theological faith.
The book Utopia proposed several controversial ideas, including the subject of religion. Thomas More, author of Utopia, risked persecution from his own church by writing his most famous book.