The theme of public reason runs through almost all of my work, as explained in the introduction to my 2012 essay collection, Science and Public Reason. I have tried to understand how ruling institutions justify exercises of power and authority in contemporary democracies, and how their practices of argumentation, delegation, and transparency are shaped by commitments to particular ways of knowing (civic epistemologies), visions of progress (sociotechnical imaginaries), styles of reasoning, and ideas of adequate representation (bioconstitutionalism). In my empirical studies, I frequently ask what makes exercises in public reason succeed or fail. The following texts look at the construction and uptake of public reason, and associated constructions of experts and lay publics: