I would guess storytelling. Hope this helps.
Because of their vital contributions and more politicians becoming sympathetic to their cause as a result.
To serve as president, one must: be a natural-born U.S. citizen of the United States; be at least 35 years old; be a resident in the United States for at least 14 years.
Before the Black Death hit Europe, almost all things, especially elements of daily life, were under the influence of the church. In medieval times, even boiling an egg took “the time to say a prayer”. But the most important thing was that the church had always told people right from wrong. Since the afterlife was judged more important than the actual lifetime, it was considered essential to be given the last rites and to confess sins before dieing to be sure of salvation.
When the plague arrived, people believed it to be a punishment of God. Therefore, they often turned to the Church for help. But since the priests and bishops could not actually offer a cure or even an explanation, the Catholic Church lost a lot of its influence and for many people, their view of the world changed drastically.
This information came from https://deathblack.wordpress.com/category/church/
Pros are that it’s a very self sufficient system of growing, made land management easier, it allowed for simplistic chain of command.
Cons are that it was easy to abuse the power given, the kings could raise taxes whenever they wanted, and you couldn’t marry someone from another social ranking
