This polemic book against the resolution “The Dictatorship of the proletariat and socialist democracy” presented by the United Secretariat of the Fourth International, was finished in July 1978. The manuscript was shown to an important group of political friends, who returned to me with some modifications and suggestions. None of them brought substantial changes to the original text, with the exception of that made by an Italian friend, on the definition of the revolutionary dictatorship. His view was to add to the six points with which I had defined revolutionary dictatorship of the proletariat one which defined its nature. I picked up this observation, as well as all the others.