When Mao Tse-tung loosed the Great Proletarian Cultural Revolution on his land in May 1966, China all but ceased to practice an active foreign policy. So complete was Peking's withdrawal from the international arena as it struggled to cope with its domestic convulsions that all but one of its 42 ambassadors were called home. To this day, only 21 have been replaced.
Now China is emerging from its internal preoccupations−with a vengeance. Mao last week issued a rare personal statement calling for a worldwide "revolutionary struggle against U.S. imperialism and its lackeys."...