The new movements instead of pushing for specific changes in public policy emphasize social changes in identity, lifestyle and culture. Thus the social aspect is seen by the NSM as more important than the economic or political aspects. Some NSM theorists, like F. Parkin ("Middle Class Radicalism", 1968), argue that the key actors in these movements are different as well, as they are more likely to come from the "new middle class" rather than the lower classes. Unlike pressure groups that have a formal organisation and 'members', NSMs consist of an informal, loosely organised social network of 'supporters' rather than members. British sociologist Paul Byrne (1997) described New Social Movements as 'relatively disorganised'.