 As a different example, consider now the history of the Gulag in the Soviet Union. Anne Applebaum (2003) provides a detailed and honest history of the Gulag and its role in maintaining Soviet dictatorship. Stalin’s dictatorship depended on a leader, a party, and a set of institutions that worked to terrorize and repress the population of the USSR. The NKVD (the system of internal security police that enforced Stalin’s repression), a justice system that was embodied in the Moscow Show Trials of 1936–38, and especially the system of forced labor and prison camps that came to be known as the Gulag constituted the machinery of repression through which a population of several hundred million people were controlled, imprisoned, and repressed. Further, like the Nazi regime, Stalin used the slave labor of the camps to contribute to the economic output of the Soviet economy. Applebaum estimates that roughly two million prisoners inhabited several thousand camps of the Gulag at a time in the 1940s, and that as many as 18 million people had passed through the camps by 1953 (Applebaum 2003: 13). The economic role of the Gulag was considerable; significant portions of Soviet-era mining, logging, and manufacturing took place within the forced labor camps of the Gulag (13). Applebaum makes a crucial and important point about historical knowledge in her history of the Gulag: the inherent incompleteness of historical understanding and the mechanisms of overlooking and forgetting that get in the way of historical honesty. The public outside the USSR did not want to know about these realities. Applebaum notes that public knowledge of the camps in the West was available, but was de-dramatized and treated as a fairly minor part of the reality of the USSR. The reality—that the USSR embodied and depended upon a massive set of concentrations camps where millions of people were enslaved and sometimes killed—was never a major part of the Western conception of the USSR. She comments, "far more common, however, is a reaction of boredom or indifference to Stalinist terror" (18). Wide knowledge in the West of the scope and specific human catastrophe of the Gulag was first made available by Aleksandr Isayevich Solzhenitsyn (1974).