One State, Two State, or No Solution.
Here is an interesting discussion of one state vs two states by Jerome Slater, Steve Walt, John Mearsheimer, and Yousef Munayyer.
And just for contrast here is Benny Morris on why he thinks there is no solution, but that's OK.
As you will see both Slater and Morris are pretty pessimistic about any positive change. The difference is that Slater is aghast and worried, Morris justifies it all and is not too worried. I'm definitely in the Slater camp.