Henry VIII decided to separate himself with the connection with the Roman Church in the 1500s because his first wife Catherine of Aragon was not able to produce him a son which he wanted for his future heir to the England throne. Catholic Church does not believe in Divorce, so, he decided to take the matter in his hand by breaking from Catholic. Henry VIII broke with Rome papacy and established the Church of England.
Because the Pope was powerful as him, so to cancel it he decided to ask the Pope the divorce. And the Pope didn't allow. So he crated a new religion and became the head of the church and of the state.
