The main way in which it is believed that environmental change contributed to the fall of the Maya Civilization is that there was a sharp drop in the amount of rainfall per year, which led to a decrease in harvests.
I pretty sure it was “the inability of congress to raise an army”
Well the Iraq and Afghanistan war..... that was from 2004-2011 and then from 2011 to modern day all we have done is advise and supply coalition and help beat back ISIS
Assuming you're referring to the Protestant reformers in Europe during the 1500, their main idea was that the Church had become corrupt, and that each person could have a personal relationship with God without giving into Church demands, which was wildly appealing to many people because they wouldn't have to spend money to please God.