Abstract
The chapter analyses the case of #yosoy132, a student movement that protested against the manipulation of information by the mass media, through the lens of the Political Opportunities Structure framework. This framework refers to the consistent, although not necessarily permanent or formal, dimensions of the political context that make collective action more or less likely. The author highlights the particular features of recent social movements such as the participation of the youth, the use of public spaces and social networks, the role of emotions as an incentive to be part of the movement, among others. The main goal of her chapter is to understand under what conditions #yosoy132 has developed its strategy, and which were the weaknesses and limitations faced by the movement to take part in the definition of public affairs, or in other words, what explains its failure to achieve its political goals.