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.
Che Guevara
During Guevara's time living hidden among the poor subsistence farmers of the Sierra Maestra mountains, he discovered that there were no schools, no electricity, minimal access to healthcare, and more than 40 percent of the adults were illiterate. As the war continued, Guevara became an integral part of the rebel army and "convinced Castro with competence, diplomacy and patience". Guevara set up factories to make grenades, built ovens to bake bread, taught new recruits about tactics, and organized schools to teach illiterate campesinos to read and write. Moreover, Guevara established health clinics, workshops to teach military tactics, and a newspaper to disseminate information. The man whom "Time" dubbed three years later "Castro's brain" at this point was promoted by Fidel Castro to "Comandante" (commander) of a second army column.