Socialist economics comprises the economic theories, practices, and norms of hypothetical and existing socialist economic systems.There are today no socialist systems in the world-economy any more than there are feudal systems because there is only one world-system. It is a world-economy and it is by definition capitalist in form. Socialism involves the creation of a new kind of world-system, neither a redistributive world-empire nor a capitalist world-economy but a socialist world-government. I don't see this projection as being in the least utopian but I also don't feel its institution is imminent. It will be the outcome of a long social struggle in forms that may be familiar and perhaps in very few forms, that will take place in all the areas of the world-economy.I am convinced there is only one way to eliminate (the) grave evils (of capitalism), namely through the establishment of a socialist economy, accompanied by an educational system which would be oriented toward social goals. In such an economy, the means of production are owned by society itself and are utilized in a planned fashion. A planned economy, which adjusts production to the needs of the community, would distribute the work to be done among all those able to work and would guarantee a livelihood to every man, woman, and child. The education of the individual, in addition to promoting his own innate abilities, would attempt to develop in him a sense of responsibility for his fellow-men in place of the glorification of power and success in our present society. Socialist economics comprises the economic theories, practices, and norms of hypothetical and existing socialist economic systems. A socialist economic system is characterised by social ownership and operation of the means of production that may take the form of autonomous cooperatives or direct public ownership wherein production is carried out directly for use. Socialist systems that utilize markets for allocating inputs and capital goods among economic units are designated market socialism. When planning is utilized, the economic system is designated as a socialist planned economy. Non-market forms of socialism usually include a system of accounting based on calculation-in-kind to value resources and goods. The term 'socialist economics' may also be applied to the analysis of former and existing economic systems that were implemented in socialist states, such as in the works of Hungarian economist János Kornai. Socialist economics has been associated with different schools of economic thought. Marxian economics provided a foundation for socialism based on analysis of capitalism, while neoclassical economics and evolutionary economics provided comprehensive models of socialism. During the 20th century, proposals and models for both planned economies and market socialism were based heavily on neoclassical economics or a synthesis of neoclassical economics with Marxian or institutional economics. Karl Marx and Friedrich Engels believed that hunter-gatherer societies and some primitive agricultural societies were communal, and called this primitive communism. Engels wrote about this at length in the book The Origin of the Family, Private Property and the State, which was based on the unpublished notes of Marx on the work of Lewis Henry Morgan. Values of socialism have roots in pre-capitalist institutions such as the religious communes, reciprocal obligations, and communal charity of Mediaeval Europe, the development of its economic theory primarily reflects and responds to the monumental changes brought about by the dissolution of feudalism and the emergence of specifically capitalist social relations. As such it is commonly regarded as a movement belonging to the modern era. Many socialists have considered their advocacy as the preservation and extension of the radical humanist ideas expressed in Enlightenment doctrine such as Jean-Jacques Rousseau's Discourse on Inequality, Wilhelm von Humboldt's Limits of State Action, or Immanuel Kant's insistent defense of the French Revolution. Capitalism appeared in mature form as a result of the problems raised when an industrial factory system requiring long-term investment and entailing corresponding risks was introduced into an internationalized commercial (mercantilist) framework. Historically speaking, the most pressing needs of this new system were an assured supply of the elements of industry – land, elaborate machinery, and labour – and these imperatives led to the commodification of these elements. According to influential socialist economic historian Karl Polanyi's classic account, the forceful transformation of land, money and especially labour into commodities to be allocated by an autonomous market mechanism was an alien and inhuman rupture of the pre-existing social fabric. Marx had viewed the process in a similar light, referring to it as part of the process of 'primitive accumulation' whereby enough initial capital is amassed to begin capitalist production. The dislocation that Polyani and others describe, triggered natural counter-movements in efforts to re-embed the economy in society. These counter-movements, that included, for example, the Luddite rebellions, are the incipient socialist movements. Over time such movements gave birth to or acquired an array of intellectual defenders who attempted to develop their ideas in theory.