An absorbing account of the descendants of the ancient Aztecs and of the survival of their culture into the twentieth century in the Valley of Mexico is presented in this fascinating volume. Focusing on San Francisco Tecospa--a village of some eight hundred Indians who still spoke Nahuatl, whose lives were dominated by supernaturalism, and who observed with only slight modification much of their Aztec heritage--this story bears out the anthropological principle that innovations are most likely to be accepted when they are useful, communicable, and compatible with established tradition.