future world revolution. As long as capitalism survived, even if the socialist world predominated, North Korea could still be threatened by the restoration of capitalism. The revival of the term "state" in the Soviet Union under Stalin led to the revival of "nation" in North Korea under Kim Il-sung. Despite official assertions that the Soviet Union was based on "class" rather than "state", the latter was revived during the 1930s. In 1955 Kim Il-sung expressed a similar view in his speech, "On Eliminating Dogmatism and Formalism and Establishing Juche in Ideological Work": From then on, he and the WPK stressed the roles of "revolutionary tradition" and Korea's cultural tradition in its revolution. At party meetings, members and cadres learned about North Korea's national prestige and its coming rejuvenation. Traditional customs were revived, to showcase Korean-ness. By 1965, Kim Il-sung stated that if communists continued opposing individuality and sovereignty, the movement would be threatened by dogmatism and revisionism. He criticized those communists who, he believed, subscribed to "national nihilism by praising all things foreign and vilifying all things national" and tried to impose foreign models on their own country. By the 1960s, Juche was a full-fledged ideology calling for a distinct path for North Korean socialist construction and non-interference in its affairs; however, a decade later it was defined as a system whose "fundamental principle was the realization of sovereignty". Although WPK theoreticians were initially hostile towards the terms "nation" and "nationalism" because of the influence of the Stalinist definition of "state", by the 1970s their definition was changed from "a stable, historically formed community of people based on common language, territory, economic life, and culture" to include "shared bloodline". During the 1980s a common economic life was removed from the definition, with shared bloodline receiving increased emphasis. With a democratic transition in South Korea and the dissolution of the Soviet Union, the WPK revised the meaning of nationalism. Previously defined in Stalinist terms as a bourgeois weapon to exploit the workers, nationalism changed from a reactionary to a progressive idea. Kim Il-sung differentiated "nationalism" from what he called "genuine nationalism"; while genuine nationalism was a progressive idea, nationalism remained reactionary: Allegations of xenophobia and racism During the 1960s the WPK began forcing ethnic Koreans to divorce their European spouses (who were primarily from the Eastern Bloc), with a high-ranking WPK official calling the marriages "a crime against the Korean race"