In modern times, during the period of the bourgeois revolutions, bourgeois concepts of the human being played a positive and often progressive revolutionary role in the struggle against the religious and feudal world-view, since the bourgeois sociopolitical, sociological, and philosophical theories of the seventeenth and eighteenth centuries contained some elements of scientific validity, objective truth. It is precisely these factors that later became part of the Marxist-Leninist theory of society.