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How does society work? How do groups emerge within society? What are the effects of emotions and memory on our everyday actions? George Homans, like us, had a perspective on what society is, except that he was a sociologist. Homans theory, which is an exchange theory, is based on a few propositions about the fundamental actions of individuals, and how values, memory, and expectations affect their behavior. In this paper, our main interest and purpose are to find out whether these propositions can satisfy our conception of society and generate essential properties of it computationally. To do so, Based on Homans' prepositions, we provide the opportunity for each agent to exchange with other agents. That is, each agent transacts with familiar agents based on his previous history with them and transacts with newly found agents through exploration. One novelty of our work is the investigation of implications of the base theory while covering its flaws with minimal intervention; flaws which are inevitable in a non-mathematical theory. The importance of our work is that we have scrutinized the consequences of an actual sociological theory. At the end of our investigation, we propose another proposition to Homans theory, which makes the theory more appealing, and we discuss other possible directions for further research.

Use-based welfare achieves redistribution by reallocating rights to use and benefit from idle resources, rather than through tax and transfer. How and why has this form of welfare provision emerged as an urban institution, and what affects whether it endures? This article compares projects to grant poor and unemployed Chicagoans access to land for gardens and small farms between 1895 and 1935, explaining how this form of social support came about through experiments with rules, norms, and forms of property. While social policy is typically understood as emerging through the realization of rights to public support, use-based welfare turns instead on efforts to create a legal privilege for the needy to use idle resources. During the Progressive Era and the Great Depression, this form of relief was pitched as both an alternative and a complement to welfare based on tax and transfer. Yet efforts to establish it as a permanent institution repeatedly failed, due to implementation challenges, opposition from people committed to treating land and food as commodities, and the nonemergence of a social movement to defend land access. Recognizing the historical dynamics of use-based welfare offers a new perspective on the contemporary resurgence of urban farming as a strategy for addressing unemployment and poverty.

The “elitist approach” to democratization contends that “democratic regimes that last have seldom, if ever, been instituted by mass popular actors” (Huntington 1984:212). This article subjects this observation to empirical scrutiny using statistical analyses of new democracies over the past half-century and a case study. Contrary to the elitist approach, I argue that new democracies growing out of mass mobilization are more likely to survive than are new democracies that were born amid quiescence. Survival analysis of 112 young democracies in 80 different countries based on original data shows that the longer the mobilization, the more likely the ensuing democracy is to survive. I use a case study of South Africa to investigate the mechanisms. I argue that sustained unarmed uprisings have generated the longest-lasting new democracies—largely because they are forced to develop an organizational structure, which provides a leadership cadre for the new regime, forges links between the government and society, and strengthens checks on the power of the post-transition government.