Why did Civil Rights protestors need non-violent training?

In contrast, the leaders of the Civil Rights Movement chose the tactic of nonviolence as a tool to dismantle institutionalized racial segregation, discrimination, and inequality. Indeed, they followed Martin Luther King Jr.'s guiding principles of nonviolence and passive resistance.

answer; the period of time known as the middle ages;

france,russia and prussia had absolute monarchy and it meant:

when louis xiv inherited the throne, he was able to serve as his chief minister.louis xiv ruled as an absolute monarch.