"You have to reach a situation in which the practical experience of the nations will lead to solutions to legal problems," said Tel Aviv University law Prof. Yoram Dinstein. "It takes time for this practice to consolidate."
The conference, on "Hamas, the Gaza War, and Accountability under International Law," was devoted in part to responding to the accusations of many countries and human rights organizations that Israel violated international law and perpetrated war crimes during Operation Cast Lead in the Gaza Strip in December and January.
Columbia Law School professor George Fletcher, who spoke by video, said, "Israel should recognize that our best friend in the international arena is not a set of people but a set of institutions, principles and ideas that are incorporated in the United Nations Charter."
The first principle of international law was the right of every independent state to self-defense and to repel attacks against its territory by states, terrorist organizations or groups of people, he stressed.
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