 In Guevara 's private writings from this time ( since released ) , he displays his growing criticism of the Soviet political economy , believing that the Soviets had " forgotten Marx " . This led Guevara to denounce a range of Soviet practices including what he saw as their attempt to " air @-@ brush the inherent violence of class struggle integral to the transition from capitalism to socialism " , their " dangerous " policy of peaceful co @-@ existence with the United States , their failure to push for a " change in consciousness " towards the idea of work , and their attempt to " liberalize " the socialist economy . Guevara wanted the complete elimination of money , interest , commodity production , the market economy , and " mercantile relationships " : all conditions that the Soviets argued would only disappear when world communism was achieved . Disagreeing with this <unk> approach , Guevara criticized the Soviet Manual of Political Economy , correctly predicting that if USSR would not abolish the law of value ( as Guevara desired ) , it would eventually return to capitalism . 
