Both documents show not only that Kapp's critique of private enterprise was too unbalanced for Clark's taste, but also that Clark's own views on the role of private enterprise had changed since the 1920s. Since the draft of the manuscript reviewed by Clark is not available, we do not know in how far Kapp modified his critique. In this context it is of interest that Kapp's letter to Clark on December 12,1945 referred to a working title that differs from the later book publication