when, on the basis of Marx’s words we maintain that without a revolutionary and communist party, the proletariat may be a class for bourgeois science, but it is not for us and Marx himself; then the conclusion to be deduced is that, in order to achieve victory, it will be necessary to have a party, worthy at the same time of both characteristics, those of historical party and formal party, i.e. to have solved in the reality of action and history the apparent contradiction – that dominated a long and difficult past – between historical party, then as far as the content (historical, invariant programme) is concerned, and contingent party, that is relating to the form, operating as a force and a physical praxis of a decisive part of the struggling proletariat.