Wyman cites several organizations as comparatively effective in rescue efforts, particularly some Orthodox Jewish organizations, the American Jewish Joint Distribution Committee, and the Revisionist Zionist faction called the 'Bergsonites,' which took their name from their leader, the so-called "Peter H. Bergson," which was actually the English nom-de-guerre of Hillel Kook, a Palestinian Jew and nephew of Rav Abraham Isaac Kook who was associated with the radical armed underground group Irgun Zvai Leumi. "Bergson" came to the United States to form the 'American Friends of a Jewish Palestine,' the 'Committee for a Jewish Army,' and other efforts to rescue European Jewry.