This paper revisits old questions of the proper subject and bounds of economics: Does economics study "provisioning"? or markets? or a method of reasoning, selfinterested rational optimization? A variety of scholars and others in many fields make use of a taxonomy of society consisting of three "spheres": markets, governments, and communities. It is argued here that this tripartite taxonomy of society is fundamental and exhaustive. A variety of ways of understanding this taxonomy are explored, especially Fiske's (1991, 2004) Relational Models theory. Then-after communities and their products, social goods, are defined more thoroughly-a visual model of interactions among the three spheres is presented. The model is first used briefly to understand the historical development of markets. The model is then applied to understanding how economic thinking and market ideology, including the notion of social capital, can be destructive of communities and their production of social goods (and their production of social capital as well). It's not possible to measure these effects monetarily, so calculating precisely "how this affects results" in a standard economic model is impossible. Nevertheless we could better prepare students for real-world analysis, and better serve our clients, including the public, ifwhenever relevant, such as in textbook introductions and in benefit/cost analyseswe made them aware of the limitations of economic analysis with respect to communities and social goods. The three-spheres model offered here, based on Fiske's Relational Models theory, facilitates this awareness.

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We have not clearly acknowledged the abstraction from unpriceable “social goods” (derived from communities) which, different from private and public goods, simply disappear if it is attempted to market them. Separability from markets and economics has not been argued, much less established. Acknowledging communities would reinforce rather than undermine them, and thus facilitate the production of social goods. But it would also help economics by facilitating our understanding of – and response to – financial crises as well as environmental destruction and many social problems, and by reducing the alienation from economics often felt by students and the public.