The initial idea of the struggle for the primacy of opposites of contradiction appeared in 1981 after reading Marx’s Capital as a continuation of the ideas of the struggle between capitalism and feudalism. But before that, the principle emerged as an insight — truth in development — after studying Lenin’s philosophical fragments. Lenin discovered mode of development as the bifurcation. The theory of development originated in 1982. and in 2021 was supplemented by the theory of ordering.