Abstract
Recent work in the theory of action by analytical philosophers has focused on explaining actions by citing the agent's motivating reason(s). But this ignores a pattern of explanation typical in the social sciences, i.e. situating the agent in a reference group whose members typically manifest that behavior. In some cases the behavior of such groups can itself be shown to be the product of social forces. Two extended examples of this explanatory pattern are studied. In each case the motivating reasons of the agents concerned can scarcely be understood apart from reference to the groups of which the agents are members and the social forces which work on those groups. However, attention to the agent's own reasons for action remains important, in part because of action theory's critical potential to help liberate people from arbitrary, hypostasized social forces