According to Nathan Thrall, from Elliott Abrams's inside accounts of negotiations between 2001 and 2005, it would appear to be an inescapable conclusion that violence played an effective role in shaking Israeli complacency and furthering Palestinian goals: the U.S. endorsed the idea of a Palestinian State, Ariel Sharon became the first Israeli Prime Minister to affirm the same idea, and even spoke of Israel's "occupation", and the bloodshed was such that Sharon also decided to withdraw from Gaza, an area he long imagined Israel keeping. However, Zakaria Zubeidi, former leader of the Al-Aqsa Martyrs' Brigades, considers the Intifada to be a total failure that achieved nothing for the Palestinians.