It is known as mass parties to the political groups that are characterized by numerous adherents call, which are organized in macro party are made aware of the program and contribute online with a financial contribution to the maintenance and development of proselytizing activities. Unlike the traditional parties, generally consisting of a small group of activists, the mass incorporated into its ranks the greatest possible number of members and, within them, seek to add to personalities and leaders of groups or communities. To a large extent, their power depends on the mass membership process, which sometimes reaches millions of people. These clusters are characterized by a rigid vertical structure. The central management is responsible for coordinating the activities of agencies that meet the diverse functions and those following sections represent the grouping in different population centers.
The European socialist and labor parties were the first to adopt the characteristics of mass organizations. Other parties, as Democrats tried to mimic the organizational model, but without the success they had achieved the leftist organizations.
The parties settled in their countries authoritarian regimes, like fascism, Nazism and Communism, also functioned as mass parties. Having taken power, they retained this structure, which empelaron to control the rest of society.