On Contradiction was a historical document, based on Marxism-Leninism's dialectical materialism. The concrete political situations from the 1930's up to now have largely confirmed the author's analysis, and these confirmations and this analysis provided new insights into Marxist-Leninist theory. The world is moving ahead, and countless events are happening. The theories of Marx, of Lenin and of Mao are there to offer occasions for reflexion and perhaps experimentation. But is there something new to be added to">On Contradiction? Will there be an utter rethinking or a creative understanding of it?