Human interaction, polarisation, and democratic reform: integrating political science with an interpersonal systems approach.

In "Coordination in interpersonal systems," Emily Butler urges psychologists to move beyond a focus on the individual to better understand dynamic interpersonal systems. She argues that an improved understanding of coordination, in particular, will allow them to not only better understand human behaviour but also solve many social problems, especially polarisation. I agree with both this empirical shift and Butler's normative interest. This said, Butler's framework would benefit from more attention to social identity - which tends to structure polarisation - and emotion - which fuels it. Butler's framework would also be enriched by incorporating knowledge accumulated by political scientists on the import of institutions, the history of party coalitions, and the pursuit of power by social actors. With respect to a reform agenda, a possible place to start is lessening partisan polarisation and thereby strengthening democratic governance, which, at its best, represents an inclusive and synergistic system of human interaction.