It will be extremely difficult for any number of reasons for Israel to leave the West Bank, but it will be impossible for Israel to survive over the long-term if it remains an occupier of a group of people who don’t want to be occupied. I understand the security consequences of an Israeli departure from most of the West Bank, but I also understand that there is ultimately no choice. I don’t believe a one-state solution is any sort of solution at all; Israel/Palestine will devolve quickly into civil war. The only solution is a two-state solution.