This article of critical revision investigates on the epistemological conditions that give place to a historical in force paradigm like that T.S. Kuhn named "normal science", his predominance, his trends used in fact and the capitulation of the sciences in general, the social sciences especially and a part of the marxist investigations, for decades, succumbing under a supposed ideological "plurality" "posmodernist", in the interests of the so called "complexity theory", the "complex thinking" and corresponding "science of the complexity", but deeply antidialectical and positivist.