According to Converse, the ideas/beliefs of an ideology are diffused in packages—i.e., diffusion necessarily involves constraint. However, a person may become aware of these “packages” and the substance of an ideology of which they are a part without accepting them. Consequently, diffusion produces an increase in both awareness and constraint with the former increasing more than the latter. Diffusion may also take two forms. The ideology may be accepted by more members of the same social class from which the movement's leaders were recruited (horizontal diffusion); or the ideology may spread beyond the confines of the original class to attract the support of the less advantaged (vertcal diffusion).