The twenty-first century has witnessed a shift in science communication ideals from one-way science popularization activities towards more reflexive, participatory approaches to public engagement with science. Yet our longue duéee histories of science communication's antecedents focus on the former and have neglected the latter. In this paper I identify parallels between modern science communication ideals and an iconic Enlightenment text, Condorcet's Sketch for a Historical Picture of the Progress of the Human Mind (1795). I show that Condorcet's carefully negotiated balance between