Ideas and people may be mobilized in order to influence the thinking of policy makers or society to either promote a specific point of view or enact policy in the form of laws or programs that benefit the ideas or people. This mobilization of ideas and people is known as political advocacy, which falls into two broad categories: social action and social mobilization, which can—but not necessarily—give rise to social movements, and interest and lobbying groups. According to Mancur Olson, groups are organized to pursue a common good or benefit. The success or failure of such groups can be explained using models such as the classical model, the resource mobilization model, and the “political process” model. The success of political advocacy is contingent upon a number of interrelated concepts and characteristics, including access to resources (money, people, and time), good leadership, a sense of identity or common focus, and the opportunity to be heard. A movement can distribute its message to its target audience—for example, policy makers, opinion leaders, potential participants, or the public at large—by means of information and communications technologies (ICTs). Two theses are used to assess the effectiveness of ICTs in political advocacy: the mobilization thesis and the reinforcement thesis. The inclusion of international communication has enriched our understanding of how, when, where, and why political advocacy is or is not effective.