Legitimate dealers, museums and private collectors have a financial incentive to pay for expert excavation and analysis of artifacts, because that kind of documentation makes the objects more valuable. A nation could maintain a public registry of discoveries and require collectors to give scholars access to the artifacts, but that can be accomplished without making everything the property of the national government.

The timing of Dr. Hawass’s current offensive, as my colleague Michael Kimmelman reported, makes it look like retribution against the Westerners who helped prevent an Egyptian from becoming the leader of Unesco, the United Nation’s cultural agency. But whatever the particular motivation, there is no doubt that the cultural-property laws have turned archeological discoveries into political weapons.

Image HISTORIC A temple artifact the Metropolitan Museum of Art returned to Egypt. Credit... Egyptian Supreme Council of Antiquities/European Pressphoto Agency

In his book “Who Owns Antiquity?”, James Cuno argues that scholars have betrayed their principles by acquiescing to politicians who have exploited antiquities to legitimize themselves and their governments. Saddam Hussein was the most blatant, turning Iraqi archeology museums into propaganda for himself as the modern Nebuchadnezzar, but other leaders have been just as cynical in using antiquities to bolster their claims of sovereignty.

Dr. Cuno advocates the revival of partage, the traditional system in which archeologists digging in foreign countries would give some of their discoveries to the host country and take others home. That way both sides benefit, and both sides have incentives to recover antiquities before looters beat them to it. (To debate this idea, go to nytimes.com/tierneylab.)

As the director of the Art Institute of Chicago, Dr. Cuno has his own obvious motives for acquiring foreign antiquities, and he makes no apology for wanting to display Middle Eastern statues to Midwesterners.

“It is in the nature of our species to connect and exchange,” Dr. Cuno writes. “And the result is a common culture in which we all have a stake. It is not, and can never be, the property of one modern nation or another.”