Short answers, pulled from the story.
Hans Kohn was an American philosopher and historian who pioneered the academic study of nationalism. He was born on the 15th of September 1891 in Prague, then part of the Austro-Hungarian Empire, and died on the 16th of March 1971.
Hans Kohn was born in Prague, Bohemia, then part of the Austro-Hungarian Empire, into a German-speaking Jewish family. He graduated from a German Gymnasium there in 1909 before studying philosophy, political science and law at the German half of Charles-Ferdinand University.
Hans Kohn was called into the infantry of the Austro-Hungarian Army in late 1914 and sent to the Eastern Front in the Carpathian Mountains. Russian forces captured him in 1915 and held him in a prison camp in Central Asia, in what is now Turkmenistan, until pro-western Czechoslovak Legions freed him during the civil war that followed the Bolshevik revolution.
Hans Kohn resigned from Keren HaYesod in 1929, titling his resignation letter "Judaism is Not Zionism." Three months after Arab attacks on Jewish residents in Hebron that August, he wrote a further letter saying Zionists had relied "exclusively upon Great Britain's military might" rather than seeking "the consent of the indigenous people" through negotiation.
In his 1944 book The Idea of Nationalism, Hans Kohn argued that nationalism developed along two separate paths, one western and one eastern. He traced how the growth of liberal thought within western civilization gave rise to nationalism.
Hans Kohn taught modern history at Smith College in Northampton, Massachusetts, and at City College of New York from 1948 to 1961. He also taught at the New School for Social Research and at Harvard Summer School.