This paper interprets the state of social work practice through the use of path dependence theory, which models the notion that history matters, and has been developed by economists to explain, among other things, why less desirable technologies are often adopted even when better ones are known to exist. The theory sheds light on the fact that a professional paradigm can become a dominant one, and that a profession can be "locked into" that paradigm even though others more suitable to its values and goals are known. One of the major mechanisms which brings this about, that of increasing returns, is explored. A brief historical perspective of social work, including social work with groups, is presented in light of the theory. This paper then establishes theoretical foundations for a practice that incorporates social action.Practice illustrations are presented. The paper argues that integrating social action in everyday practice does not require a revolutionary shift, but strategies that build on existing knowledge and skills.