In the aftermath of the Second World War, engineer and chief science advisor to Franklin Delano Roosevelt Vannevar Bush wrote "Modern Arms and Free Men: A Discussion of the Role of Science in Preserving Democracy." World War II had been marked by incredible technological innovations that changed the course of the war, culminating in the atom bomb. The lessons of that war, Bush hoped, would help chart a course for the United States through its new confrontation with its ally-turned-adversary, the Soviet Union.

Two general schools of thought regarding Crowe and his famous Memorandum have emerged. Some scholars paint Crowe as a latter-day Cassandra who foresaw the structural trends that were hurling the two powers toward confrontation and articulated the necessary course of action, which his government failed to undertake until it was too late. Harvard’s Graham Allison compares the Crowe Memorandum to the writings of Thucydides, whose History of the Peloponnesian War identified the dilemma that a dominant power faces when it must either accede to the rise of a challenger or risk eventual war with it. The other school of thought argues that Crowe delivered only self-fulfilling prophecies by helping to institutionalize an attitude of anti-German animus. One prominent German historian even dubbed Crowe the “evil spirit of the Foreign Office.” With these two schools of thought forming in play, the bulk of the literature on Crowe has accordingly sought to determine the precise extent and manner of his influence on British-German relations both before and after the First World War.

Americans were naturally interested in the course and outcome of the European Revolutions of 1848, which included the overthrow of the July Monarchy of Louis Philippe in France, the deposition of Metternich in Austria, the establishment of the Frankfurt Parliament in Germany, the creation of republics in Venice and Rome, and an uprising in Poland against the Prussian occupation. The American imagination was particularly captivated by the revolution in the Hungarian lands of the Habsburg Empire and the subsequent struggle of the Magyars, the main ethnic group in those lands, to achieve independence from Austria. The administration of Zachary Taylor had already dispatched an envoy to central Europe, with instructions to recognize the Hungarian Republic if it proved to be viable.