Policy communities use agreed-upon symbols to construct their visions of problems, causes, and solutions. As long as these images and symbols are maintained throughout society, or remain largely invisible and unquestioned, agenda access for groups that do not share these images is likely to be difficult; change is less likely until the less powerful group's construction of the problem becomes more prevalent. If alternative selection is central to the projection of political power, an important corollary is that powerful groups retain constructions of problems, or alternatives to their resolution.