All societies are differentiated by age. But in some, this
differentiation takes the form of institutionalized, formally graded age
classes, the members of which share an assigned 'structural' age, if not
necessarily the same physiological age. The nature of formal age group
systems has become one of the classic issues in modern social
anthropology, although until now there has been no comprehensive
explication of these complex forms of social organization. In this book,
Bernardo Bernardi, one of the pioneers of the anthropological study of
age class systems, provides a way of making sense of the diversity of
such systems by analysing cross-culturally their common features and the
pattern of their differences, and showing that they serve a general
purpose for the organization of society and for the distribution and
rotation of power.