Since political polarization significantly impacts contemporary politics and democracy, much of the research in the social sciences is dedicated to this topic. In recent times, philosophers joined the discussion related to the research on political polarization, primarily in the fields of political philosophy and political epistemology. The main aim of this paper is philosophical analysis of some dominant explanations of political polarization, but also to propose solutions for a way out of political polarization from the perspective of political philosophy. In (...) a nutshell, to find solutions for a way out of political polarization, I will be looking in the direction of boosting epistemic rationality and fostering communication in conditions of tolerance and equality. (shrink)

The my-side bias is a well-documented cognitive bias in the evaluation of arguments, in which reasoners in a discussion tend to overvalue arguments that confirm their prior beliefs, while undervaluing arguments that attack their prior beliefs. The first part of this paper develops and justifies a Bayesian model of myside bias at the level of individual reasoning. In the second part, this Bayesian model is implemented in an agent-based model of group discussion among myside-biased agents. The agent-based model is then (...) used to perform a number of experiments with the objective to study whether the myside bias hinders or enhances the ability of groups to collectively track the truth, that is, to reach the correct answer to a given binary issue. An analysis of the results suggests the following: First, whether the truth-tracking ability of groups is helped or hindered by myside bias crucially depends on how the strength of myside bias is differentially distributed across subgroups of discussants holding different beliefs. Second, small groups are more likely to track the truth than larger groups, suggesting that increasing group size has a detrimental effect on collective truth-tracking through discussion. (shrink)