In the 1990s when socialism collapsed in eastern Europe, Chairman Kim Jong Il made public in succession immortal classic works that indicated outstanding ideas and theories for the victorious advance of the socialist cause in order to make all the people realize the root cause of collapse of socialism and encourage the struggle of the world progressive parties.

Kim Jong Il clearly expounded that the party leadership is vital to the socialist cause in his classic work The Workers’ Party of Korea Organizes and Guides All the Victory of Our People published on October 3, 1990.

Kim Jong Il explained in his work that party leadership is vital to the socialist cause, the decisive guarantee of the strengthening the driving force of the socialist cause and increasing its role, the fundamental condition for developing the socialist cause in accordance with a correct struggle strategy and proper tactics, and is indispensable if revolutionary principles are to be adhered to consistently and implemented thoroughly in the whole course of developing the socialist cause.

Kim Jong Il made public the classic work On the Fundamentals of Revolutionary Party Building on October 10, 1992. In the work, he clarified the programmatic guiding principles that purity of the socialist idea must be defended firmly and continuity of leadership must be ensured if the cause of socialism is to be completed and, to do so, the party must be cemented.