Historian Benny Morris on the future and peace, in Haaretz:

'A peace agreement based on partition doesn’t appear realistic under existing circumstances, and what is Levy proposing instead? A state of all of its citizens, a single democratic state between the Mediterranean and the Jordan River. It sounds good – particularly if you are sitting in café in Paris or London, but we live in the jungle of the Middle East, surrounded by such successful countries as Syria, Lebanon, Iraq, Libya, Yemen and Saudi Arabia; in short, by Muslim Arab countries that are far from embracing the values of democracy and tolerance and liberalism.
Are the Palestinians not Muslim (other than perhaps 5 percent who are Christian)? Are the Hamas regime in Gaza and the Palestinian Authority in the West Bank liberal and tolerant and democratic? Are there grounds for believing that the Palestinians would conduct themselves differently than their Arab brethren elsewhere? In short, are the Palestinians comparable to Norwegians? A one-state solution with Jews and Arabs is a recipe for endless violence and anarchy that would ultimately lead to a country with an Arab majority – and a persecuted Jewish minority that would do anything to escape, as the members of Jewish communities in Arab countries did when their neighbors chased them out between 1948 and 1965.
In his article, Levy notes the hostility and hate that developed among the Arabs toward the Jews over the past 100 years (and to a lesser extent, hatred of Jews toward Arabs also developed).
And rightfully so. From the Arabs’ standpoint, we have stolen the country from them, trampled upon their dignity, jailed many and killed the parents of thousands of them. Would such things be forgotten when the Arabs, along with us, establish one state? Wouldn’t it make more sense for the Arabs to use the new state to exact their revenge and retake the land and the homes that were “stolen” from them in 1948 and subsequently? There is also no doubt that the relative wealth of the Jews in the country would be tempting to the less well-off Arabs. Property crime would skyrocket.
In the 1920s, 1930s and 1940s, there was a handful of Jews who, through the groups Brit Shalom and Ihud, advocated for a binational state. The idea never took off. The vast majority of Jews rejected the idea, but it attracted even less support (almost no one, actually) among the Arabs.
And the few Jews – less than half a transit camp – who supported the idea never managed to solve the “demographic problem” – in the face of the reality of an Arab majority and Jewish minority between the Mediterranean and the Jordan. If the single state would be democratic and have an Arab majority, then the majority would decide the state’s character and course of action. The Jews would be marginalized and then – out.
The idea proposed by Levy of a single state faces the same problem. There are currently about 6 to 7 million Arabs and about the same number of Jews between the Mediterranean and the Jordan. In another decade or two, by virtue of their more rapid rate of population growth, there would be a solid Arab majority – which would only grow once the single state is established, and after its Arabs also seek the return to the country of millions of Palestinian refugees from Lebanon, Syria and Jordan (and how would the Jews prevent that?).
And then the one state, with an Arab majority, would conduct itself in accordance with the way of life of the majority of the people. Would the custom of killing to maintain the family’s honor disappear? Would violence and crime, reckless driving and government and clan corruption, which are apparent on a daily basis in Arab communities, vanish? What Jews would want to live in such a country? The Jews of the country would flee, as Jews in Algeria and Libya and Egypt and Syria and Iraq and Yemen did. Levy may be among the last remaining Jews in the land of their dreams. May he enjoy it.
If we are permitted to return to reality for a moment, it seems to me that what existed will continue. The occupation regime will continue to function. The Arabs will suffer and the Jews will also suffer (although a bit less). And maybe Levy is right and this could go on for another 100 years, although I have my doubts.
At the end of the process, the one state will take shape. The Jews will control it until international sanctions and Arab rebellion and pressure from the neighbors overcome them. Then there will be a state with an Arab government and a shrinking Jewish minority.
This 24th Arab state will join the Arab League. The State of Palestine will slowly sink into the Middle Eastern sand alongside its neighbors after the oil reserves in the Arabian peninsula have been consumed.'

Read the complete article here.

I respect Benny Morris, and this article is worth reading, even if you disagree with Benny Morris, but it seems to me a bit simplistic to act as if the Jewish and Arab communities in Israel (and elsewhere) are perfectly homogeneous. Also, moral progress is mainly a fairytale, but that doesn't mean that people are incapable of changing. Sometimes circumstances forces them to change.

His determinism is the weak point in his argument and whether his rather bleak prediction of the long-term future might be right or not, who knows, but his refusal to believe in the power of assimilation is awkward.
Tribalism is hard to overcome, but the belief that some people are doomed to tribalism is superficial.