 In 1921 Reichenbach published a very limited précis of the approach to the theory of relativity he ultimately presented in 1924 (Reichenbach, 1921d). The Axiomatization is either a work very much out of its time, or the times have not changed much. Reichenbach’s statement of purpose might have been written at any time in the last quarter of the 20th century in response to Quine’s holism and to Thomas Kuhn’s incommensurability thesis (see the entries on  belief  and on  Thomas Kuhn).  