I think it would be climatic changes. After the ice age, lands became a good ground to plant food resources. People learned through experience, observation, and survival the basic things to survive the world and finally stopped in a place and build their own homes and finally settle. They learned that hunting is not enough to sustain their needs so they studied on cultivating their lands to produce their needed food.
Well if we are talking about voting rights and equality, that would be Martin Luther King. He set equality for black people while Abraham Lincoln had just freed them decades earlier.
The Eastern and Western churches were split apart in the Great Schism which
happened in the year 1054.
They wanted a strong leader and party to boost up the economy because there where heavy sanctions after WW1 and Hitler had a way with words to get people to listen
