In this paper we formally discuss the mechanism of solidarity from the viewpoint of tolerance and norm. Defining solidarity as via net-base symbols, we formalize believes that specify what symbols are required for in terms of Boolean equations. Tolerant solidarity is confronted with contradictory relationship between universalism and relativism. In this case "less conflictual solutions" (LCS: Murakami,1994) will be an excellent guide for tolerance when we define it as restriction of norm activation. In addition, when we consider meta-believes that represent ideas like liberal nationalism (liberal universalism), LCS works as the standard of tolerance in the acceptance process of meta-believes. Through the above-mentioned analysis, we will discuss two issues. At first, believes show different level of tolerance from the viewpoint of LCS, and the most tolerant belief is different according to positioning of actors. Then, belief-switching should have rich implication to realize tolerant solidarity. Secondly, LCS does not guarantee that liberal universalism is the most tolerant meta-belief; however, it might best fit with tolerant solidarity because it holds moderate tolerance and a consistent ideal goal at the same time. Thus, we will suggest relation-epistemological micro-macro link in order to explain the mechanism of solidarity and norms.
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