 With the exception of discussions of the “conventionality” of simultaneity, Reichenbach’s Axiomatization seems to have had little influence on subsequent work, whereas Robb’s, rediscovered in the 1970s, has attracted some development from both philosophers and physicists. The interventionist account of causation in the Axiomatization, and more clearly in The Philosophy of Space and Time, has been developed in various ways by several 21st century writers, without explicit debt to Reichenbach. Michael Friedman (2001) has attempted to revive the quasi-Kantian viewpoint of Reichenbach’s The Theory of Relativity and A Priori Knowledge emphasizing the “relativized a priori.”