I recall reading many years ago an author’s theory that much of the change throughout the Protestant world came about because of the Vietnam War. Young men of draft age found they could avoid military service by enrolling in divinity school. Once finished, these same men discovered they could use their respective churches as power bases from which to continue their original social and political activism and rebellion.
So, over the process of time, these religious leaders moved their churches from theology to social activism and social justice issues.
There were easier ways to deal with the draft than to become a Christian minister for life.
The Mormon church though, did get to hand out their own deferments, for instance they sent Mitt Romney to France.