I do not see class as a 'structure', nor even as a 'category', but as something which in fact happens (and can be shown to have happened) in human relationships... the notion of class entails the notion of historical relationship. ...And class happens when some men, as a result of common experiences (inherited or shared), feel and articulate the identity of their interests as between themselves, and as against other men whose interests are different from (and usually opposed to) theirs