In their works on The public and its problems and Politics of nature John Dewey and Bruno Latour develop theoretical models of a democratic experimentalism. Taking their assumptions as a base, this paper examines the thesis of a convergence of North American and French pragmatism. This thesis is supported not only by further analogies in the works of Dewey and Latour, but also by the pragmatic sociology of justification upheld by Luc Boltanski and Laurent Thévenot, which can be on the one hand integrated into the frame-work of Latour’s theory on democratic experimentalism. On the other hand, comparisons can readily be drawn to the pragmatic theory of social worlds and arenas of Anselm L. Strauss. The theories differ in respect to their expectations as to whether, where and how social arenas are formed, once different social worlds and conventions come into critical conflict with each other and need to be rearranged by experimental processes. However, any remaining disparity in the assumptions regarding such arena figurations of democratic experimentalism could definitely have a stimulating effect on their empirical cartography and analysis.