 Complete the following phrase:  Under his leadership, North Korea was established as a communist state with a centrally planned economy. It had close political and economic relations with the Soviet Union. By the late 1950s and during the 1960s and 1970s, North Korea enjoyed a higher standard of living than the South, which was suffering from political chaos and economic crises. The situation was reversed in the 1980s, as a newly stable South Korea became an economic powerhouse which was fueled by Japanese and American investment, military aid and internal economic development, while North Korea stagnated and then declined during the same period. Differences emerged between North Korea and the Soviet Union, chief among them was Kim Il-sungs philosophy of Juche, which focused on Korean nationalism, self-reliance and socialism. Despite this, the country received funds, subsidies and aid from the USSR and the Eastern Bloc until the 