Why reformation end?

The Protestant Reformation came to an end after the Peace of Westphalia in 1648, which recognized the sovereign authority of states and their right to determine their own religion. This led to a gradual decline in religious wars and increased religious tolerance in Europe, marking the end of the era of intense religious conflict. Additionally, the Catholic Church implemented reforms through the Council of Trent to address some of the criticisms raised by the reformers, resulting in a stabilizing of religious divisions.