Prominent Palestinian voices speaking to the entire land "from the river to the sea" have presented a clear vision.
Here's Edward Said in 1999:
"I see no other way than to begin now to speak about sharing the land that has thrust us together, sharing it in a truly democratic way, with equal rights for each citizen. There can be no reconciliation unless both peoples, two communities of suffering, resolve that their existence is a secular fact, and that it has to be dealt with as such."