Inscribed and signed with the author's initials on the front wrapper: "Fur Hans Kelsen, in Verehrung, von K.R.P." Rare association copy between two twentieth-century philosophers important for their defense of democracy in the face of authoritarianism's rise in the 1930s and beyond. The two, while united in their commitment to democracy as the ideal social framework, disagreed on the foundational reasoning behind their promotion of democratic values. Karl Popper argued that through collaborative human effort and debate it was possible to achieve continuous movement towards an ideal state of affairs, or even towards truth itself: he closes this speech with the.....