To understand the mindset that obstructed the paths out of the interwar crisis, we need to reconstruct widely held expectations for the future of states. To examine how such expectations changed, diverged and competed, this paper investigates the work of inquiry committees, ranging from British and German committees engaged in post-war economic planning to the League of Nation's Commission of Enquiry for European Union of the early 1930s. The paper concludes that the interwar crisis can only be understood if we put the Great War and the Great Depression into a common frame. The war changed expectations, but not as drastically as we would instinctively assume. The expectation of an order of expanding, integrating blocs was challenged by the emergence of new ‘small states’ but survived. It was shattered when efforts to overcome the economic slump failed, leading to a broader acceptance of territorial revisionism across Europe than hitherto assumed.