During work on a biography of Yigal Allon, Shapira became interested in the role of force in the Zionist movement, initially inspired by an article by Menachem Begin during the 1982 Lebanon War on “A War of Choice.” This resulted in a book, Herev Hayona: Hatziyonut vehakoah, 1881-1948 (Land and Power: The Zionist Resort to Force, 1881-1948). In her biography of Yigal Allon, Yigal Allon, Native Son: A Biography, Shapira in fact portrays the development of the entire Palmach generation in Palestine, the first native-born Sabra generation.