List of non-communist socialist states in the context of "Planned economy"

The Warsaw Pact (WP), formally the Treaty of Friendship, Cooperation and Mutual Assistance (TFCMA), was a collective defense treaty signed in Warsaw, Poland, between the Soviet Union and seven other Eastern Bloc socialist republics in Central and Eastern Europe in May 1955, during the Cold War. The term "Warsaw Pact" commonly refers to both the treaty itself and its resultant military alliance, the Warsaw Pact Organisation (WPO) (also known as ‘Warsaw Treaty Organization’ (‘WTO’)). The Warsaw Pact was the military complement to the Council for Mutual Economic Assistance (Comecon), the economic organization for the Eastern Bloc states.

Dominated by the Soviet Union, the Warsaw Pact was established as a balance of power or counterweight to the North Atlantic Treaty Organization (NATO) and the Western Bloc. There was no direct military confrontation between the two organizations; instead, the conflict was fought on an ideological basis and through proxy wars. Both NATO and the Warsaw Pact led to the expansion of military forces and their integration into the respective blocs. The Warsaw Pact's largest military engagement was the Warsaw Pact invasion of Czechoslovakia, one of its own member states, in August 1968. All member states participated except for Albania and Romania, resulting in Albania's withdrawal from the pact less than one month later. The pact began to unravel with the spread of the Revolutions of 1989 through the Eastern Bloc, beginning with the Solidarity movement in Poland, its electoral success in June 1989 and the Pan-European Picnic in August 1989.

Market socialism is a type of economic system involving social ownership of the means of production within the framework of a market economy. Various models for such a system exist, usually involving cooperative enterprises and sometimes a mix that includes public or private enterprises. In contrast to the majority of historic self-described socialist economies, which have substituted some form of economic planning for the market mechanism, market socialists wish to retain the use of supply and demand signals to guide the allocation of capital goods and the means of production. Under such a system, depending on whether socially owned firms are state-owned or operated as worker cooperatives, profits may variously be used to directly remunerate employees, accrue to society at large as the source of public finance, or be distributed amongst the population in a social dividend.

Market socialism can be distinguished from the concept of the mixed economy because most models of market socialism propose complete and self-regulating systems, unlike the mixed economy. While social democracy aims to achieve greater economic stability and equality through policy measures such as taxes, subsidies, and social welfare programs, market socialism aims to achieve similar goals through changing patterns of enterprise ownership and management.

The history of communism encompasses a wide variety of ideologies and political movements sharing the core principles of common ownership of wealth, economic enterprise, and property. Most modern forms of communism are grounded at least nominally in Marxism, a theory and method conceived by Karl Marx and Friedrich Engels during the 19th century. Marxism subsequently gained a widespread following across much of Europe, and throughout the late 1800s its militant supporters were instrumental in a number of unsuccessful revolutions on that continent. During the same era, there was also a proliferation of communist parties which rejected armed revolution, but embraced the Marxist ideal of collective property and a classless society.

Although Marxist theory suggested that industrial societies were the most suitable places for social revolution (either through peaceful transition or by force of arms), communism was mostly successful in underdeveloped countries with endemic poverty such as the Republic of China. In 1917, the Bolshevik Party seized power during the Russian Revolution and in 1922 created the Soviet Union, the world's first self-declared socialist state. The Bolsheviks thoroughly embraced the concept of proletarian internationalism and world revolution, seeing their struggle as an international rather than a purely regional cause. This was to have a phenomenal impact on the spread of communism during the 20th century as the Soviet Union installed new Marxist–Leninist governments in Central and Eastern Europe following World War II and indirectly backed the ascension of others in the Americas, Asia and Africa. Pivotal to this policy was the Communist International, also known as the Comintern, formed with the perspective of aiding and assisting communist parties around the world and fostering revolution. This was one major cause of tensions during the Cold War as the United States and its military allies equated the global spread of communism with Soviet expansionism by proxy.