Marxists work ethic

And SCIENTIFIC RACISM 

 The Protestant work ethic was deployed to justify child labour at home and forced labour abroad. “It is necessary to use methods that best can shake their idleness and make them realise the sanctity of work,” was how the Belgian King Leopold II rationalised working millions to death in Congo Free State. 

KARL  " A general prohibition of child labor is incompatible with the existence of large-scale industry and hence an empty, pious wish. Its realization -- if it were possible -- would be reactionary . . . " MARX 1875

 
CAPACITY FOR ECONOMIC DEVELOPMENT DEPENDS ON RACE

Capital, vol. 3, chapter 47: "The possibility is here presented for definite economic development taking place, depending, of course, upon favourable circumstances, inborn racial characteristics, etc . . . "

 RACE A DETERMINING FACTOR IN HISTORICAL DEVELOPMENT

Engels: (Marx and Engels, Selected Works, Vol. 3, p. 502.): "We regard economic conditions as the factor which ultimately determines historical development. But race is itself an economic factor".