Communism is a political and economic ideology that advocates for the establishment of a classless, stateless society in which all property is publicly owned and all members of society share in the wealth produced by their labor. The idea of communism is based on the writings of Karl Marx, who argued that capitalism, the economic system prevalent in many societies at the time, was inherently exploitative and that a more equitable society could be achieved through the abolition of private property and the establishment of a classless, communist society. In a communist society, all members of society are supposed to work and be paid according to their abilities and needs, rather than according to the market value of their labor. The goal of communism is to create a society in which all members are equal and there is no exploitation or oppression.
There are no specific places called "communism" in the sense that there are no physical locations or territories that are exclusively designated as communist. Instead, the term "communism" refers to a set of ideas and principles that have been applied in various ways in different places and at different times in history. There have been a number of countries that have claimed to be socialist or communist, such as the Soviet Union, China, and Cuba, where various aspects of communist ideology have been implemented as part of the government's economic and political policies. However, the actual experiences of these countries have varied widely, and the principles of communism have often been compromised or distorted in practice.