ABSTRACT
In the early 20th century, under the new historical conditions when liberal capitalism entered imperialism, Lenin proposed that the socialist revolution might first be victorious in one or in several countries, but that a complete socialist society could not be built in one country. Accomplishment of a complete socialist society requires the proletariat all over the world to work together. The idea that peace and development are the themes of the current era is a major contribution of Deng Xiaoping to the idea that socialism is a “world historic cause.” Finally, and most importantly, the idea that peace and development are the themes of the era is closely linked to China’s insistence on shifting its focus of work onto economic construction. If we had believed that the theme of the era was still war and revolution, we would have taken class struggle as the key factor in our country and advocated to solve international problems by force.
