The American Christian Fundamentalism has challenged the American politics by promoting a severe religious agenda with the help of groups like the Moral Majority and the Christian Coalition, which put a significant amount of money into politics to get politicians elected with religious belief.
In the late 70s, a tidal wave of Christian fundamentalism swept across the world, challenging the concept of the separation of church and state and resisting modernization of religion. The movement recruited new followers through various means such as church outreach, schools, TV stations, colleges, and seminaries.
American fundamentalists have traveled to foreign countries such as Uganda to advocate for fundamentalist laws, which has led to the persecution and criminalization of activities such as homosexuality in those countries. This is in contrast to how countries like Iran used to be before they underwent political and social changes.