EMIR SADER EMBODIES, to the extent any one person can, the trajectory of Latin America’s left movements. A Marxist sociologist with a long track record of studying Latin American politics, currently Executive Secretary of the Latin American Council of Social Sciences (CLACSO), Sader is Brazilian by birth but fled Brazil at the end of the 1960s as the dictatorship tightened its grip. In Chile, he then participated in the electoral path to socialism preached by Salvador Allende’s Popular Unity government, until the 1973 coup forced him to flee again.