ATLANTA — We do not yet know the policy of the next administration toward Israel and Palestine, but we do know the policy of this administration. It has been President Obama’s aim to support a negotiated end to the conflict based on two states, living side by side in peace.

That prospect is now in grave doubt. I am convinced that the United States can still shape the future of the Israeli-Palestinian conflict before a change in presidents, but time is very short. The simple but vital step this administration must take before its term expires on Jan. 20 is to grant American diplomatic recognition to the state of Palestine, as 137 countries have already done, and help it achieve full United Nations membership.

Back in 1978, during my administration, Israel’s prime minister, Menachem Begin, and Egypt’s president, Anwar Sadat, signed the Camp David Accords. That agreement was based on the United Nations Security Council Resolution 242, which was passed in the aftermath of the 1967 war. The key words of that resolution were “the inadmissibility of the acquisition of territory by war and the need to work for a just and lasting peace in the Middle East in which every state in the area can live in security,” and the “withdrawal of Israel armed forces from territories occupied in the recent conflict.”

Image From left, President Anwar Sadat of Egypt, Prime Minister Menachem Begin of Israel and President Jimmy Carter of the United States in 1978 during the White House announcement of a Middle East peace agreement reached at Camp David. Credit... Associated Press

The agreement was ratified overwhelmingly by the Parliaments of Egypt and Israel. And those two foundational concepts have been the basis for the policy of the United States government and the international community ever since.