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
Guevara's aim was to export the revolution by instructing local anti-Mobutu Simba fighters in Marxist ideology and foco theory strategies of guerrilla warfare. In his "Congo Diary" book, he cites the incompetence, intransigence and infighting among the Congolese rebels as key reasons for the revolt's failure. Later that year, on November 20, 1965, suffering from dysentery and acute asthma, and disheartened after seven months of defeats, Guevara left Congo with the six Cuban survivors of his 12-man column. Guevara stated that he had planned to send the wounded back to Cuba and fight in Congo alone until his death, as a revolutionary example. But after being urged by his comrades, and two emissaries sent by Castro, at the last moment he reluctantly agreed to leave Africa. During that day and night, Guevara's forces quietly took down their base camp, burned their huts, and destroyed or threw weapons into Lake Tanganyika that they could not take with them, before crossing the border into Tanzania at night and traveling by land to Dar es Salaam. In speaking about his experience in Congo months later, Guevara concluded that he left rather than fight to the death because: "The human element failed. There is no will to fight. The [rebel] leaders are corrupt. In a word ... there was nothing to do." Guevara also declared that "we can't liberate by ourselves a country that does not want to fight." A few weeks later, he wrote the preface to the diary he kept during the Congo venture, that began: "This is the story of a failure."