Alter-globalization as a social movement is seen as a worthy cause because its goals aim to sustain those being afflicted by the selfish acts of global corporations and their negative effect on human value, the environment, and social justices. It also serves to unite various people around the world for a good cause: to fight for better treatment of Third World countries and their economies, workers rights, fair/equal human rights. Many are committed to the goals set forth by alter-globalization groups because of the perceived negative effects globalization is creating around the world. Examples include: the exploitation of labor, outsourcing of jobs to foreign nations (though some argue this is a nationalistic rather than alter-globalist motive), pollution of local environments, and harm to foreign cultures to which jobs are outsourced.
Alter-globalization allows one the opportunity to see the difference they are working towards by eliminating the negative side effects already affecting our world (i.e. environmental pollution). It also calls for solidarity amongst peer/community relations that can only be experienced by being a part of the system that causes change.