Join host John Green to learn about Martin Luther and the Protestant Reformation. Prior to this event, almost everyone in Europe was part of the Roman Catholic Church. However, during Martin Luther's lifetime, the Church was in desperate need of spiritual and moral reform. Combined with the new ideas in the political and social scenes in Europe, this led Luther to leave the Church and start his own, which spread rapidly. Then, what started out as a doctrinal dispute turned into an all-out social revolt: peasants against landlords, and kings against the Catholic Church. Both politically- and faith-charged, this period had lasting repercussions on Christianity, politics, and social order. [15:06]