Henry Siegman in the National Interest:
The two-state solution did not die a natural death. It was strangulated as Jewish settlements in the West Bank were expanded and deepened by successive Israeli governments in order to prevent the emergence of a viable Palestinian state. The settlement project has achieved its intended irreversibility, not only because of its breadth and depth but also because of the political clout of the settlers and their supporters within Israel who have both ideological and economic stakes in the settlements’ permanence.
Someone needs to start a running tally of the number of times articles arguing the two state solution is dead, or dying appears. It's starting to remind me of this: