[1][2] He is best known for his biographical study on Henryk Grossman, for which he won the Deutscher Memorial Prize in 2007.
[3] Chris Harman of the British Socialist Workers Party and editor of International Socialism described the biography as "a valuable addition to our theoretical armour.
"[4] Kuhn is of Jewish origin and is a member of Jews Against Oppression and Occupation.
[5] He was the convenor of ACTNOW, the umbrella anti-war organisation in Canberra, formed in response to the wars on Afghanistan[6] and Iraq.
[7] He is also a long-term member of the Trotskyist organisation Socialist Alternative[8] and was a founding editor of the online journal Marxist Interventions.