 It is fair to say that The Theory of Probability was not well received, drawing intense criticism from Karl Popper (1934), who had read Reichenbach’s papers presenting a frequentist interpretation of probability, C.I. Lewis (1952), Bertrand Russell (1948), and Ernest Nagel (1936, 1938). Kolmogorov’s measure theoretic axioms for probability, which appeared in 1933, soon overshadowed Reichenbach’s formulation of the theory of probability. 