In the patio behind the Orante Intourist Hotel at the Black Sea resort of Sochi, an American scholar and a leading Soviet physicist were skimming a Frisbee at each other. The Russian, Mikhail Dmitrievich Millionshchikov, had approached the game hesitantly, perhaps because the American. Columbia University's Marshall Shulman, a specialist in Russian affairs, had demonstrated such skill. But soon Millionshchikov was lunging enthusiastically after the elusive plastic saucer.
The game was the most striking example of peaceful coexistence at the 19th Pugwash conference of scholars from East and West. In the...