World revolution call for an organized proletariat.
 Since they had been relying on the idea that an underdeveloped and agrarian country like Russia would be able to build socialism with help from successful revolutionary governments in the more industrialized parts of Europe, they found themselves in a crisis once it became clear that no such help would arrive; see Socialism in one country
 In the 1980s and 1990s there was a return to right-wing, economically conservative ideologies (spearheaded, among other examples, by Thatcherism in the United Kingdom and Reaganomics in the United States) and free-market reforms in China and in Vietnam

