Renouvin began his historical career specializing on the origins of the
French Revolution, especially the
Assembly of Notables of 1787 for which he was awarded his PhD. After World War I, he turned to the study of the
origins of World War I. As a veteran whose body had been scarred by the war, Renouvin was very interested in knowing why the war had begun. In the interwar period, the question of responsibility of the war had immense political implications because the German government kept on insisting that because of the Article 231 of the
Treaty of Versailles was the "
war guilt clause", the entire treaty rested upon Article 231, and if it could be proven that Germany was not responsible for the war, the moral basis of Versailles would be undermined. As such, the
Auswärtiges Amt had a
War Guilt Section, devoted solely to proving that the
Reich was not responsible for the war of 1914, and funded the work of Americans like historian
Harry Elmer Barnes who likewise was determined that it was the allies who were the aggressors of 1914. In 1925, Renouvin published two books, described as “definitive” by historian David Robin Watson in
The Encyclopedia of Historians and Historical Writing about World War I. In the first book,
Les Origines immédiates de la guerre (28 juin-4 août 1914), Renouvin showed that Germany was responsible for the First World War, and France had not started the war. In
Les Origines immédiates de la guerre, Renouvin wrote about the origins of the war: Germany and Austria did not agree to accept any other solution other than the resort to force; they decided on their plan deliberately and after coolly considering all the possible consequences. With regard to the
immediate origins of the conflict, this is the fact that dominates all the others American historian
Jay Winter and French historian
Antoine Prost wrote in 2005 about Renouvin: "We have come back full circle to his position, published only seven years after the end of the conflict. One can only admire how scholarly and cautious he was, and how well his conclusions have stood the test of time". In the second book
Les Formes du gouvernement de guerre, Renouvin offered a comparative political history of
Germany and
France in the First World War, describing how France was able under the strain of war to preserve her democracy, but in Germany, what small elements of democracy that had existed in 1914 had been swept away by military dictatorship by 1916, headed by Field Marshal
Paul von Hindenburg and General
Erich Ludendorff. Both books involved Renouvin in a polemical debate with the
French left, German historians and German apologists like
Harry Elmer Barnes, who claimed that it was France and Russia that were the aggressors in the
July Crisis of 1914. In the 1920s, it was often claimed that from 1912 to 1914, there had been a strategy of
Poincaré-la-guerre (Poincaré's War) and that French President
Raymond Poincaré had, supposedly in conjunction with Emperor
Nicholas II of Russia planned an aggressive war to dismember Germany. By a close study of the documents then available in the 1920s, Renouvin was able to rebut the charges of both
Poincaré-la-guerre and of Germany being a victim of Franco-Russian aggression, and subsequent research since then has confirmed Renouvin's initial conclusions. Renouvin's work was funded by the French government to rebut the claims of the War Guilt Section of the
Auswärtiges Amt, and French leftists attacked Renouvin for being an "official" historian, but Renouvin was critical of aspects of French prewar policy. He was the first historian to expose the
French Yellow Book of 1914, a collection of diplomatic documents relating to the July Crisis, for containing forgeries. Renouvin described his work in 1929 as: Tens of thousands of diplomatic documents to read, the testimony of hundreds of thousands of witnesses to be sought out and criticized, a maze of controversy and debate to be traversed in quest of some occasional revelation of importance-this is the task of the historian who undertakes to attack as a whole the great problem of the origins of the World War During the 1920s, one of the most popular historians on the subject of the July Crisis was the American Barnes, who was closely associated with and funded by the
Centre for the Study of the Causes of the War in Berlin headed by the prominent
völkisch activist Major Alfred von Wegerer, a pseudohistorical research institute secretly funded by the German government, who had emerged as the world's leading advocate of the thesis that First World War was indeed
Poincaré-la-guerre. After publishing his book
The Genesis of the World War in 1926, Barnes was invited by the former German Emperor Wilhelm II to visit him in his Dutch exile to thank him personally. An awestruck Barnes wrote back to describe his meeting with the former Kaiser: "His Imperial Majesty was happy to know that I did not blame him for starting the war in 1914.... He disagreed with my view that Russia and France were chiefly responsible. He held that the villains of 1914 were the International Jews and Free Masons, who, he alleged, desired to destroy national states and the Christian religion". Wilhelm's anti-Semitic remarks about the war being the work of the Jews set Barnes off in an increasing bizarre anti-Semitic search to blame all of the world's problems on the Jews, a process that culminated after 1945 when Barnes become one of the world's first Holocaust deniers. Given that Renouvin and Barnes had markedly different views on who was responsible for the war and in light of Barnes's tendency to personally attack anyone whose views differed from him in the vituperative language possible, often accompanied by claims that Barnes's targets were just puppets of the Jews, Renouvin and Barnes became involved in a rancorous debate about just who was responsible for the war. Because the German government had published a selective and misleading collection of documents relating to the
July Crisis, and the French government had not published any documents from the Quai d'Orsay, Renouvin's work was not widely accepted in the 1920s, but a fuller opening of the German archives after World War II has validated Renouvin's scholarship. Renouvin himself often complained in the 1920s and 1930s that the Quai d'Orsay's policy of keeping its archives closed while the
Auswärtiges Amt was publishing its archives made the former seem like it had something to hide and so made ordinary people all over the world more open to the German case. Renouvin himself took the lead in having the French archives opened and became the president of the French historical commission in charge of publishing the French documents relating to the July Crisis. Renouvin himself created a magazine relating to the subject, ''Revue d'histoire de la Guerre Mondiale
(Review of the History of the World War
), and he published another book on the subject, La Crise européenne et la grande guerre
(The European Crisis and the Great War''), in 1934. ==
Forces profondes==