'Too often, in the study of contention, the material and the cultural have been seen as incompatible forms of explanation. In this empirically rich, theoretically important book, Simmons shows how the material and ideational were fused to catalyze popular protests over water in Cochabamba and rising corn prices in Mexico. In doing so, she has made it much harder for scholars of contention to ignore the causal force of grievances or to depict material threats in strictly economic terms.' Douglas McAdam, Ray Lyman Wilbur Professor of Sociology, Stanford University, California