This document summarizes the history and key events of the 15M Spanish movement from 2004-2012. It describes the context leading up to the 2011 protests, including discontent with political parties following terrorist attacks, a housing movement in 2006, and growing online activism. On May 15, 2011, large demonstrations occurred under the slogans "Real Democracy Now" and "They Don't Represent Us." Protesters occupied public squares without political symbols or leaders, focusing on open discussion and building new ways of organizing through networking and technology. Despite right-wing victories in subsequent elections, the movement reflected the views of the majority of Spaniards and influenced public debate.