Absent persecution, religion separated from the power of the state may flourish. Sometimes it triumphs even over persecution. Joined to the state, however, it tends to be corrupted.

During the European Middle Ages, kings used the church to increase their power. Religious leaders began allying with kings. The religious hierarchy become corrupted. Christianity itself split into warring factions.

Many lost faith in religion, and Christendom gave way to the Age of Reason.

Meanwhile, in newer settlements in North America, government began to separate itself from religion. Amazingly, religion flourished and gained influence.

Religion works best as leaven within a society. Join it with political power, and corruption sets in.