TEL AVIV — Ten years ago, on Israel's 50th anniversary, the peace process begun by the 1993 pathbreaking Oslo accord — reached by Israel and the Palestinian Authority — established the legitimacy of two peoples' existence in their shared homeland on the basis of territorial compromise. There was a general feeling that this long conflict was being resolved.

Unfortunately, the past 10 years have witnessed a painful setback in many areas. Individuals and peoples are capable of enduring difficulties if there is a sense that the future will be better and conflicts resolved. But a sudden backward regression can lead to despair, which we feel today.

Why is it that struggles far more complex than the Israel-Arab conflict — apartheid in South Africa, the partition of Germany or the collapse of the Soviet Union — all seem to have been resolved, usually without bloodshed, whereas the Middle East conflict, after more than a century, claims more victims every day?