Social action is a method of social work that aims to mobilize groups and bring about structural changes in social systems to promote social justice and empowerment. It uses strategies like propaganda and social legislation. The objectives of social action include preventing needs, improving conditions for large groups, and redistributing power and resources. Principles of social action include building credibility, legitimizing goals, dramatizing issues, using multiple strategies like education and power, taking a dual approach of building counter-systems, and implementing various economic, social, and political programs. The process involves defining needs, planning action, mobilizing resources, implementing programs, and evaluating outcomes.