Che Guevara
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 incrementalist approach, Guevara criticized the "Soviet Manual of Political Economy", correctly predicting that if USSR did not abolish the law of value (as Guevara desired), it would eventually return to capitalism.
Osvaldo Peredo
Peredo was born and grew up in Trinidad in Beni Department in northern Bolivia, and was strongly influenced by his older brothers who helped found the Bolivian Communist Party and were leaders in guerrilla movements. After receiving his initial medical training Peredo left the profession and joined the Ñancahuazú Guerrilla movement of Che Guevara, known as the National Liberation Army (ELN). However, because of the need for medical services, Peredo left to attend Patrice Lumumba University in Moscow where he received advanced medical training as well as idelological training. Upon his return to Bolivia he became one of the leaders of the movement. After Che Guevara was killed, Peredo was among those few who managed to escape to Chile. In November 1970, Salvador Allende, after he assumed the presidency of Chile, pardoned Peredo, Mario Suarez and the other survivors.