A group of neighbors protest at the door of the district deputy demanding more attention for the area. A group of women interrupts the normal functioning of a shopping center that does not hire Latinas. A group of African Americans heads to the city's wealthy neighborhood in order to point out the worthy owners of the housing dwellers they inhabit. In the US, these types of actions have been developed since the 1950s by the community organizing movement.

Saul Alinsky played a leading role both at the beginning and in the first development of this branch of American activism: he participated in the organization of the black ghettos of Chicago and New York, encouraged the constitution of the first foundations and associations of the organization and from His experience and his reflections trained hundreds of activists. In 1971, he wrote Treatise for Radicals in order to condense this knowledge about how to connect with people and how to launch fun and always effective tactics and campaigns. A collection of pragmatic methods and suggestions that start from a realistic analysis of the situation and that basically have only one objective: to demonstrate that with power the power can be taken from the powerful, that our horizon can be the revolution.