Diplomatic history deals with the history ofinternational relations between states. Diplomatic history can be different from international relations in that the former can concern itself with the foreign policy of one state while the latter deals with relations between two or more states. Diplomatic history tends to be more concerned with the history of diplomacy, but international relations concern more with current events and creating a model intended to shed explanatory light on international politics.[1]
In the 5th century BCE the Greek historianThucydides was highly concerned with the relations among states. HoweverLeopold von Ranke (1795–1886), the leading German historian of the 19th century, codified the modern form of diplomatic history. Ranke wrote largely on the history ofEarly Modern Europe, using the diplomatic archives of the European powers (particularly theRepublic of Venice) to construct a detailed understanding of the history of Europewie es eigentlich gewesen ist ("as it actually happened"). Ranke saw diplomatic history as the most important kind of history to write because of his idea of the "Primacy of Foreign Affairs" (Primat der Aussenpolitik), arguing that the concerns of international relations drive the internal development of the state. Ranke's understanding of diplomatic history relied on using as sources the large number of official documents produced by modern western governments; he argued that historians should examine such sources in an objective and neutral spirit.[1][2]
Ranke's understanding of the dominance of foreign policy, and hence an emphasis on diplomatic history, remained the dominant paradigm in historical writing through the first half of the twentieth century. In the early 20th centuries, work by prominent diplomatic historians such asCharles Webster,Harold Temperley, andBernadotte Everly Schmitt focused on great European events, especially wars and peace conferences. A notable breakthrough in diplomatic historiography occurred in 1910 when the French government start to publish all of the archives relating to thewar of 1870.[1]
Ranke's approach, combined with the effects of theWar Guilt Clause in theTreaty of Versailles (1919) that blamed Germany, stimulated a massive outpouring in many languages on theorigins of the war of 1914.[3] The Bolsheviks in Russia published key secret papers from the Allies in 1918 and other governments commissioned carefully edited, multivolume collections of key documents in their possession. Numerous historians wrote multi-volume histories of the origins of the war. In the interwar period, most diplomatic historians tended to blame all of the Great Powers of 1914 for the First World War, arguing that the war was in effect everybody's responsibility. In general, the early works in this vein fit fairly comfortably into Ranke's emphasis onAussenpolitik.[4]
HistorianMuriel Chamberlain notes that after the First World War:
She adds that after 1945, the trend reversed, allowing political, intellectual and social history to displace diplomatic history.
For the first half of the 20th century, most diplomatic history working within the narrow confines of thePrimat der Aussenpolitik approach was very narrowly concerned with foreign-policy making elites with little reference to broader historical forces. The most notable exceptions to this tendency wereA. J. P. Taylor andWilliam Medlicott in Britain,Pierre Renouvin in France, andWilliam L. Langer in the United States, who examined economic and domestic political forces.[1]

SirWinston Churchill's multi-volumeThe Second World War, especially the first volumeThe Gathering Storm (1948) set the framework and the interpretation for much laterhistoriography. His interpretation, echoing his own position before the war, that World War II was caused by the mad ambitions ofAdolf Hitler; Churchill damned the cowardly and weak-willed British and French leaders who usedappeasement in a futile effort to avoid the war. Churchill did not consider the argument that the alternative to appeasement was a premature war that Germany would win in 1938. The British historianA. J. P. Taylor's 1961 bookThe Origins of the Second World War challenged Churchill's viewpoint and argued that Hitler had no master-plan for conquering the world. Instead he was an ordinary statesman –-an opportunistic leader seizing whatever chances he had for expansionism. The fact that a world war started over Poland in 1939 was due to diplomatic miscalculation by all the countries concerned, instead of being a case of German aggression. British historians such as D.C. Watt, Paul Kennedy, George Peden and David Dilks argued that appeasement was not an aberration, and that it was an old British tradition which in this case flowed from numerous structural, economic and military factors. Historians such asChristopher Thorne andHarry Hinsley abandoned the previous focus on individual leaders to discuss the broader societal influences such as public opinion and narrower ones like intelligence on diplomatic relations. In recent years the debates regarding the 1930s have continued, but new approaches are in use, such as an analysis in terms of Britain's national identity.[7][8]
A group ofFrench historians centered aroundPierre Renouvin (1893–1974) and hisprotégésJean-Baptiste Duroselle andMaurice Baumont [fr] started a new type of international history in the 1950s that included taking into account what Renouvin calledforces profondes (profound forces) such as the influence of domestic politics on French foreign policy. However, Renouvin and his followers still followed the concept ofla décadence with Renouvin arguing that French society under theThird Republic was “sorely lacking in initiative and dynamism” and Baumont arguing that French politicians had allowed "personal interests" to override "any sense of the general interest". In 1979, Duroselle's bookLa Décadence offered a total condemnation of the entire Third Republic as weak, cowardly and degenerate.[9][10]
At the same time, in 1961 when the German historianFritz Fischer publishedGriff nach der Weltmacht, which established that Germany had caused the First World War led to the fierce "Fischer Controversy" that tore apart the West German historical profession.[11] One result of Fischer's book was the rise in thePrimat der Innenpolitik (Primacy of Domestic Politics) approach.[11] As a result of the rise of thePrimat der Innenpolitik school, diplomatic historians increasing started to pay attention to domestic politics.[11] In the 1970s, the conservative German historianAndreas Hillgruber, together with his close associateKlaus Hildebrand, was involved in a very acrimonious debate with the leftish German historianHans-Ulrich Wehler over the merits of thePrimat der Aussenpolitik ("primacy of foreign politics") andPrimat der Innenpolitik ("primacy of domestic politics") schools.[12] Hillgruber and Hildebrand made a case for the traditionalPrimat der Aussenpolitik approach to diplomatic history with the stress on examining the records of the relevant foreign ministry and studies of the foreign policy decision-making elite.[13] Wehler, who favored thePrimat der Innenpolitik approach, for his part contended that diplomatic history should be treated as a sub-branch ofsocial history, calling for theoretically based research, and argued that the real focus should be on the study of the society in question.[14] Moreover, under the influence of thePrimat der Innenpolitik approach, diplomatic historians in the 1960s, 70s and 80s start to borrow models from the social sciences.[11]
A notable example of thePrimat der Innenpolitik approach was the claim by the BritishMarxist historianTimothy Mason who claimed that the launch of World War II in 1939 was best understood as a “barbaric variant of social imperialism”.[15] Mason argued that “Nazi Germany was always bentat some time upon a major war of expansion”.[16] However, Mason argued that the timing of such a war was determined by domestic political pressures, especially as relating to a failing economy, and had nothing to do with what Hitler wanted.[16] In Mason's view in the period between 1936 and 1941, it was the state of the German economy, and not Hitler's "will" or "intentions" that was the most important determinate on German decision-making on foreign policy.[17] Mason argued that the Nazi leaders were deeply haunted by theNovember Revolution of 1918, and was most unwilling to see any fall in working class living standards out of the fear that it might provoke another November Revolution.[17] According to Mason, by 1939, the “overheating” of the German economy caused by rearmament, the failure of various rearmament plans produced by the shortages of skilled workers, industrial unrest caused by the breakdown of German social policies, and the sharp drop in living standards for the German working class forced Hitler into going to war at a time and place not of his choosing.[18] Mason contended that when faced with the deep socio-economic crisis the Nazi leadership had decided to embark upon a ruthless “smash and grab” foreign policy of seizing territory in Eastern Europe which could be pitilessly plundered to support living standards in Germany.[19] Mason's theory of a "Flight into war" being imposed on Hitler generated much controversy, and in the 1980s he conducted a series of debates with economic historianRichard Overy over this matter. Overy maintained the decision to attackPoland was not caused by structural economic problems, but rather was the result of Hitler wanting a localized war at that particular time in history. For Overy, a major problem with the Mason thesis was that it rested on the assumption that in a way unrecorded by the records, that information was passed on to Hitler about theReich's economic problems.[20] Overy argued that there was a major difference between economic pressures inducted by the problems of theFour Year Plan, and economic motives to seize raw materials, industry and foreign reserve of neighboring states as a way of accelerating the Four Year Plan.[21] Moreover, Overy asserted that the repressive capacity of the German state as a way of dealing with domestic unhappiness was somewhat downplayed by Mason.[20]
In addition, because World War II was a global war, diplomatic historians start to focus onJapanese-American relations to understand why Japan had attacked the United States in 1941. This in turn led diplomatic historians to start to abandon the previous Euro-centric approach in favor of a more global approach.[22] A sign of the changing times was the rise to prominence of such diplomatic historians such as the Japanese historian Chihiro Hosoya, the British historianIan Nish, and the American historianAkira Iriye, which was the first time that Asian specialists became noted diplomatic historians.
TheCold War anddecolonization greatly added the tendency to a more global diplomatic history. TheVietnam War led to the rise of a revisionist school in the United States, which led many American historians such asGabriel Kolko andWilliam Appleman Williams to reject traditional diplomatic history in favor of aPrimat der Innenpolitik approach that saw a widespread examination of the influence of American domestic politics together with various social, economic and cultural forces on foreign-policy making. In general, the American Cold War revisionists tended to focus on American foreign policy decision-making with respect to the genesis of the Cold War in the 1940s and on how the United States became involved in Vietnam in the 1960s. Starting in the 1960s, a ferocious debate has taken place within Cold War historiography between the advocates of the “orthodox” school which saw the Cold War as a case of Soviet aggression such asVojtech Mastny against the proponents of the “revisionist” school which saw the Cold War as a case of American aggression. Latterly, a third school known as "neo-orthodox" whose most prominent member is the American historianJohn Lewis Gaddis has emerged, which holds through the United States borne some responsibility for the Cold War, the lion's share of the responsibility goes to the Soviet Union.
In Europe diplomatic history fell out of favor in the late Cold War era. Since the collapse of communism in 1989–91, however, there has been a renaissance, led especially by historians of the early modern era, in the history of diplomacy. The new approach differs from previous perspectives by the wholesale incorporation of perspectives from political science, sociology, the history of mentalities, and cultural history.
In the U.S. since the 1980s, the discipline of diplomatic history has become more relevant to and better integrated with the mainstream of the academic history profession. It has taken the lead in internationalization of American historical studies. Since it explores the interaction of domestic and international forces, the field has become increasingly important for its study of culture and identity and the exploration of political ideologies as applied to foreign affairs. There have been major influences from other new approaches such asOrientalism andglobalism, as well as gender and racial history.[23] The history of human rights has become important as well.[24] Despite all these innovations, however, the core endeavor of diplomatic history remains the study of the state interacting with other states, which is also a key to its broadening appeal, since considerations of America's superpower status is essential to understanding the world internationally.
In the early 1980s, historianJeffrey Kimball surveyed the ideological preferences of 109 active diplomatic historians in the United States as well as 54 active military historians. He reports that:
In Europe, diplomatic history fell out of favor in the late Cold War era. Since the collapse of communism, there has been a renaissance, led especially by historians of the early modern era, in the history of diplomacy. The new approach differs from previous perspectives by the wholesale incorporation of perspectives from political science, sociology, the history of mentalities, and cultural history.[26]
In the U.S. since 1980, the discipline of diplomatic history has become more relevant to and integrated with the mainstream of the historiographic profession, having been in the forefront of the internationalization of American historical studies. As a field that explores the meeting of domestic and international forces, the study of US foreign relations has become increasingly important for its examination of both the study of culture and identity and the exploration of political ideologies. Particularly shaped by the influence of studies of Orientalism and globalism, gender studies, race, and considerations of national identity, diplomatic history was often at the cutting edge of historical research. Despite such innovations, however, the core endeavor of diplomatic history remains the study of the state, which is also a key to its broadening appeal, since considerations of US state power are essential to understanding the world internationally.[27]
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