Ernst Jäckh (February 22, 1875 – August 17, 1959) was a German journalist, diplomat, author, and academic who later lived in Great Britain and the United States.

[5][6] Under the overall guidance of pastor and politician Friedrich Naumann, Jäckh was a key organizer of the liberal movement in Germany during the early years of the twentieth century.

[1] His book Der aufsteigende Halbmond, published in 1911, sought to explain contemporary Turkey to a German readership and further the prospects of alliance between the two countries.

[8] During the war, Jaeckh was engaged in putting out propaganda in favor of the German-Turkish alliance (and trying to instigate actions that would undercut the British in the Middle East), with historian Fritz Fischer characterizing him as "the most important propagandist of Germany's eastern policy.

[9] Jäckh suffered a personal loss when his only son, 18-year-old Hans, was killed in action in September 1918, on the Chemin des Dames,[10][11] during the Second Battle of the Marne.

[6] He gave lecture tours in America, made contacts there, and secured funding for the Hochschule's library and publications from the Carnegie Endowment for International Peace and the Rockefeller Foundation.

[17] Long an advocate of a "New Germany", and with an internationalist perspective in which he saw himself as an unofficial ambassador for his country in international dealings, Jäckh continued this approach even after the Machtergreifung in January 1933.

[19] His attempts at accommodation with the Nazis were to little avail, however, as the Hochschule underwent a political purge, lost its independence, and was put under control of the Reich Ministry of Public Enlightenment and Propaganda later during 1933.

[7] In 1940, he migrated further to the United States where he became Professor of Public Law and Government at Columbia University, focusing on the politics of the regions of Germany, the Balkans, and the Middle East.