The urge to dispossess others of their property and to claim ownership of others' territory was central to Guevara's politics of raw power. In his memoirs, the Egyptian leader Gamal Abdel Nasser records that Guevara asked him how many people had left his country because of land reform. When Nasser replied that no one had left, Che countered in anger that the way to measure the depth of change is by the number of people "who feel there is no place for them in the new society." This predatory instinct reached a pinnacle in 1965, when he started talking, God-like, about the "New Man" that he and his revolution would create.

Che's obsession with collectivist control led him to collaborate on the formation of the security apparatus that was set up to subjugate six and a half million Cubans. In early 1959, a series of secret meetings took place in Tarará, near Havana, at the mansion to which Che temporarily withdrew to recover from an illness. That is where the top leaders, including Castro, designed the Cuban police state. Ramiro Valdés, Che's subordinate during the guerrilla war, was put in charge of G-2, a body modeled on the Cheka. Angel Ciutah, a veteran of the Spanish Civil War sent by the Soviets who had been very close to Ramón Mercader, Trotsky's assassin, and later befriended Che, played a key role in organizing the system, together with Luis Alberto Lavandeira, who had served the boss at La Cabaña. Guevara himself took charge of G-6, the body tasked with the ideological indoctrination of the armed forces. The U.S.-backed Bay of Pigs invasion in April 1961 became the perfect occasion to consolidate the new police state, with the rounding up of tens of thousands of Cubans and a new series of executions. As Guevara himself told the Soviet ambassador Sergei Kudriavtsev, counterrevolutionaries were never "to raise their head again."

'Counterrevolutionary" is the term that was applied to anyone who departed from dogma. It was the communist synonym for "heretic." Concentration camps were one form in which dogmatic power was employed to suppress dissent. History attributes to the Spanish general Valeriano Weyler, the captain-general of Cuba at the end of the nineteenth century, the first use of the word "concentration" to describe the policy of surrounding masses of potential opponents--in his case, supporters of the Cuban independence movement--with barbed wire and fences. How fitting that Cuba's revolutionaries more than half a century later were to take up this indigenous tradition. In the beginning, the revolution mobilized volunteers to build schools and to work in ports, plantations, and factories--all exquisite photo-ops for Che the stevedore, Che the cane-cutter, Che the clothmaker. It was not long before volunteer work became a little less voluntary: the first forced labor camp, Guanahacabibes, was set up in western Cuba at the end of 1960. This is how Che explained the function performed by this method of confinement: "[We] only send to Guanahacabibes those doubtful cases where we are not sure people should go to jail ... people who have committed crimes against revolutionary morals, to a lesser or greater degree.... It is hard labor, not brute labor, rather the working conditions there are hard."

This camp was the precursor to the eventual systematic confinement, starting in 1965 in the province of Camagüey, of dissidents, homosexuals, AIDS victims, Catholics, Jehovah's Witnesses, Afro-Cuban priests, and other such scum, under the banner of Unidades Militares de Ayuda a la Producción, or Military Units to Help Production. Herded into buses and trucks, the "unfit" would be transported at gunpoint into concentration camps organized on the Guanahacabibes mold. Some would never return; others would be raped, beaten, or mutilated; and most would be traumatized for life, as Néstor Almendros's wrenching documentary Improper Conduct showed the world a couple of decades ago.

So Time magazine may have been less than accurate in August 1960 when it described the revolution's division of labor with a cover story featuring Che Guevara as the "brain" and Fidel Castro as the "heart" and Raúl Castro as the "fist." But the perception reflected Guevara's crucial role in turning Cuba into a bastion of totalitarianism. Che was a somewhat unlikely candidate for ideological purity, given his bohemian spirit, but during the years of training in Mexico and in the ensuing period of armed struggle in Cuba he emerged as the communist ideologue infatuated with the Soviet Union, much to the discomfort of Castro and others who were essentially opportunists using whatever means were necessary to gain power. When the would-be revolutionaries were arrested in Mexico in 1956, Guevara was the only one who admitted that he was a communist and was studying Russian. (He spoke openly about his relationship with Nikolai Leonov from the Soviet Embassy.) During the armed struggle in Cuba, he forged a strong alliance with the Popular Socialist Party (the island's Communist Party) and with Carlos Rafael Rodríguez, a key player in the conversion of Castro's regime to communism.

This fanatical disposition made Che into a linchpin of the "Sovietization" of the revolution that had repeatedly boasted about its independent character. Very soon after the barbudos came to power, Guevara took part in negotiations with Anastas Mikoyan, the Soviet deputy prime minister, who visited Cuba. He was entrusted with the mission of furthering Soviet-Cuban negotiations during a visit to Moscow in late 1960. (It was part of a long trip in which Kim Il Sung's North Korea was the country that impressed him "the most.") Guevara's second trip to Russia, in August 1962, was even more significant, because it sealed the deal to turn Cuba into a Soviet nuclear beachhead. He met Khrushchev in Yalta to finalize details on an operation that had already begun and involved the introduction of forty-two Soviet missiles, half of which were armed with nuclear warheads, as well as launchers and some forty-two thousand soldiers. After pressing his Soviet allies on the danger that the United States might find out what was happening, Guevara obtained assurances that the Soviet navy would intervene--in other words, that Moscow was ready to go to war.

According to Philippe Gavi's biography of Guevara, the revolutionary had bragged that "this country is willing to risk everything in an atomic war of unimaginable destructiveness to defend a principle." Just after the Cuban missile crisis ended--with Khrushchev reneging on the promise made in Yalta and negotiating a deal with the United States behind Castro's back that included the removal of American missiles from Turkey--Guevara told a British communist daily: "If the rockets had remained, we would have used them all and directed them against the very heart of the United States, including New York, in our defense against aggression." And a couple of years later, at the United Nations, he was true to form: "As Marxists we have maintained that peaceful coexistence among nations does not include coexistence between exploiters and the exploited."

Guevara distanced himself from the Soviet Union in the last years of his life. He did so for the wrong reasons, blaming Moscow for being too soft ideologically and diplomatically, for making too many concessions--unlike Maoist China, which he came to see as a haven of orthodoxy. In October 1964, a memo written by Oleg Daroussenkov, a Soviet official close to him, quotes Guevara as saying: "We asked the Czechoslovaks for arms; they turned us down. Then we asked the Chinese; they said yes in a few days, and did not even charge us, stating that one does not sell arms to a friend." In fact, Guevara resented the fact that Moscow was asking other members of the communist bloc, including Cuba, for something in return for its colossal aid and political support. His final attack on Moscow came in Algiers, in February 1965, at an international conference, where he accused the Soviets of adopting the "law of value," that is, capitalism. His break with the Soviets, in sum, was not a cry for independence. It was an Enver Hoxha-like howl for the total subordination of reality to blind ideological orthodoxy.

The great revolutionary had a chance to put into practice his economic vision--his idea of social justice--as head of the National Bank of Cuba and of the Department of Industry of the National Institute of Agrarian Reform at the end of 1959, and, starting in early 1961, as minister of industry. The period in which Guevara was in charge of most of the Cuban economy saw the near-collapse of sugar production, the failure of industrialization, and the introduction of rationing--all this in what had been one of Latin America's four most economically successful countries since before the Batista dictatorship.

His stint as head of the National Bank, during which he printed bills signed "Che," has been summarized by his deputy, Ernesto Betancourt: "[He] was ignorant of the most elementary economic principles." Guevara's powers of perception regarding the world economy were famously expressed in 1961, at a hemispheric conference in Uruguay, where he predicted a 10 percent rate of growth for Cuba "without the slightest fear," and, by 1980, a per capita income greater than that of "the U.S. today." In fact, by 1997, the thirtieth anniversary of his death, Cubans were dieting on a ration of five pounds of rice and one pound of beans per month; four ounces of meat twice a year; four ounces of soybean paste per week; and four eggs per month.

Land reform took land away from the rich, but gave it to the bureaucrats, not to the peasants. (The decree was written in Che's house.) In the name of diversification, the cultivated area was reduced and manpower distracted toward other activities. The result was that between 1961 and 1963, the harvest was down by half, to a mere 3.8 million metric tons. Was this sacrifice justified by progress in Cuban industrialization? Unfortunately, Cuba had no raw materials for heavy industry, and, as a consequence of the revolutionary redistribution, it had no hard currency with which to buy them--or even basic goods. By 1961, Guevara was having to give embarrassing explanations to the workers at the office: "Our technical comrades at the companies have made a toothpaste ... which is as good as the previous one; it cleans just the same, though after a while it turns to stone." By 1963, all hopes of industrializing Cuba were abandoned, and the revolution accepted its role as a colonial provider of sugar to the Soviet bloc in exchange for oil to cover its needs and to re-sell to other countries. For the next three decades, Cuba would survive on a Soviet subsidy of somewhere between $65 billion and $100 billion.

Having failed as a hero of social justice, does Guevara deserve a place in the history books as a genius of guerrilla warfare? His greatest military achievement in the fight against Batista--taking the city of Santa Clara after ambushing a train with heavy reinforcements--is seriously disputed. Numerous testimonies indicate that the commander of the train surrendered in advance, perhaps after taking bribes. (Gutiérrez Menoyo, who led a different guerrilla group in that area, is among those who have decried Cuba's official account of Guevara's victory.) Immediately after the triumph of the revolution, Guevara organized guerrilla armies in Nicaragua, the Dominican Republic, Panama, and Haiti--all of which were crushed. In 1964, he sent the Argentine revolutionary Jorge Ricardo Masetti to his death by persuading him to mount an attack on his native country from Bolivia, just after representative democracy had been restored to Argentina.

Particularly disastrous was the Congo expedition in 1965. Guevara sided with two rebels--Pierre Mulele in the west and Laurent Kabila in the east--against the ugly Congolese government, which was sustained by the United States as well as by South African and exiled Cuban mercenaries. Mulele had taken over Stanleyville earlier before being driven back. During his reign of terror, as V.S. Naipaul has written, he murdered all the people who could read and all those who wore a tie. As for Guevara's other ally, Laurent Kabila, he was merely lazy and corrupt at the time; but the world would find out in the 1990s that he, too, was a killing machine. In any event, Guevara spent most of 1965 helping the rebels in the east before fleeing the country ignominiously. Soon afterward, Mobutu came to power and installed a decades-long tyranny. (In Latin American countries too, from Argentina to Peru, Che-inspired revolutions had the practical result of reinforcing brutal militarism for many years.)

In Bolivia, Che was defeated again, and for the last time. He misread the local situation. There had been an agrarian reform years before; the government had respected many of the peasant communities' institutions; and the army was close to the United States despite its nationalism. "The peasant masses don't help us at all" was Guevara's melancholy conclusion in his Bolivian diary. Even worse, Mario Monje, the local communist leader, who had no stomach for guerrilla warfare after having been humiliated at the elections, led Guevara to a vulnerable location in the southeast of the country. The circumstances of Che's capture at Yuro ravine, soon after meeting the French intellectual Régis Debray and the Argentine painter Ciro Bustos, both of whom were arrested as they left the camp, was, like most of the Bolivian expedition, an amateur's affair.

Guevara was certainly bold and courageous, and quick at organizing life on a military basis in the territories under his control, but he was no General Giap. His book Guerrilla Warfare teaches that popular forces can beat an army, that it is not necessary to wait for the right conditions because an insurrectional foco (or small group of revolutionaries) can bring them about, and that the fight must primarily take place in the countryside. (In his prescription for guerrilla warfare, he also reserves for women the roles of cooks and nurses.) However, Batista's army was not an army, but a corrupt bunch of thugs with no motivation and not much organization; and guerrilla focos, with the exception of Nicaragua, all ended up in ashes for the foquistas; and Latin America has turned 70 percent urban in these last four decades. In this regard, too, Che Guevara was a callous fool.

In the last few decades of the nineteenth century, Argentina had the second-highest growth rate in the world. By the 1890s, the real income of Argentine workers was greater than that of Swiss, German, and French workers. By 1928, that country had the twelfth-highest per capita GDP in the world. That achievement, which later generations would ruin, was in large measure due to Juan Bautista Alberdi.

Like Guevara, Alberdi liked to travel: he walked through the pampas and deserts from north to south at the age of fourteen, all the way to Buenos Aires. Like Guevara, Alberdi opposed a tyrant, Juan Manuel Rosas. Like Guevara, Alberdi got a chance to influence a revolutionary leader in power--Justo José de Urquiza, who toppled Rosas in 1852. And like Guevara, Alberdi represented the new government on world tours, and died abroad. But unlike the old and new darling of the left, Alberdi never killed a fly. His book, Bases y puntos de partida para la organización de la República Argentina, was the foundation of the Constitution of 1853 that limited government, opened trade, encouraged immigration, and secured property rights, thereby inaugurating a seventy-year period of astonishing prosperity. He did not meddle in the affairs of other nations, opposing his country's war against Paraguay. His likeness does not adorn Mike Tyson's abdomen.

Alvaro Vargas Llosa, a senior fellow at the Independent Institute, is the author of Liberty for Latin America: How to Undo Five Hundred Years of Oppression (Farrar, Straus and Giroux).