Public policies and regulations need to broaden the voices represented in the deliberation and search for solutions to societal problems. The practice of lobbying is a legitimate and legal way to reach public decision makers in order to contribute to a more participatory and plural democracy despite its bad reputation. As a general characteristic, Latin America still has shortcomings in the development of participatory democracy. Due to the lack of an organized civic culture, resources, or ignorance, civil society does not usually use planned methods for an effective exercise of the right to petition public authorities and reduces its areas of incidence to sporadic demonstrations around specific issues. However, it is possible to recognize certain key cases promoted in Argentina by civil society organizations that have achieved their purposes, such as laws related to eating disorders, equal marriage, and assisted fertilization.