 Although Poincaré’s ideas are not the central focus of the discussion of spacetime theories that blossomed in the 1960s and 1970s, his views are always in the background. Adolf Grünbaum (1968) defended geometric conventionalism, albeit with his own unique arguments rather than Poincaré’s, and critics of Grünbaum and of conventionalism generally could not help but direct some of their attention to Poincaré who was rightly seen as the preeminent precursor to all further work on geometric conventionalism. Some of this literature does directly engage with Poincaré, notably Torretti (1978).