 its theory of class conflict does not fit the multiple-class structure of modern industrial societies and is incompatible with the principle of ‘class collaboration’ upon which democratic politics depends ” ,(p323) and its utopian vision interferes with the practical interests of a “ sane political movement.
<fluency>  its theory of class conflict does not fit the multiple-class structure of modern industrial societies and is incompatible with the principle of ‘class collaboration’ upon which democratic politics depends ” ,(p323) and its utopian vision interferes with the practical interests of a “ sane political movement.
 its theory of class conflict does not fit the multiple-class structure of modern industrial societies and is incompatible with the principle of ‘class collaboration’ upon which democratic politics depends ” ,(p323) and its utopian vision interferes with the practical interests of a " sane political movement.