Darwin famously described special difficulties in explaining social evolution in insects. More than a century later, the evolution of sociality - defined broadly as cooperative group living - remains one of the most intriguing problems in biology. Providing a unique perspective on the study of social evolution, this volume synthesizes the features of animal social life across the principle taxonomic groups in which sociality has evolved. The chapters explore sociality in a range of species, from ants to primates, highlighting key natural and life history data and providing a comparative view across animal societies. In establishing a single framework for a common, trait-based approach towards social synthesis, this volume will enable graduate students and investigators new to the field to systematically compare taxonomic groups and reinvigorate comparative approaches to studying animal social evolution.

Tang provides a coherent and systematic exploration of social evolution as a phenomenon and as a paradigm. He critically builds on existing discussions on social evolution, while drawing from a wide range of disciplines, including archaeology, evolutionary anthropology, sociology, economics, political science, the philosophy of social sciences, and evolutionary biology. Clarifying the relationship between biological evolution and social evolution, Tang lays bare the ontological and epistemological principles of the social evolutionary paradigm. He also presents operational principles and tools for deploying this paradigm to understand empirical puzzles about human society. This is a vital resource for students, practitioners, and philosophers of all social sciences.

The time is ripe to investigate similarities and differences in the course of social evolution in different animals. This book brings together renowned researchers working on sociality in different animals to deal with the key questions of sociobiology. For the first time, they compile the evidence for the importance of ecological factors in the evolution of social life, ranging from invertebrate to vertebrate social systems, and evaluate its importance versus that of relatedness.

Combining original theoretical ideas and interpretation with ethnographic evidence, Johnson and Earle seek to describe and account for the development of complex human societies. A wealth of case studies are referred to throughout and these are used to support arguments for the proposed causes, mechanisms and patterns of change and for the factors involved, such as technological change, population growth, warfare, the exchange of goods. This second edition sees a complete re-writing of the theoretical chapters, taking account of recent research, plus a new chapter on changes since the Industrial Revolution and the globalisation of society.

The national governments of Central America were constructed between 1840 and 1900, a time when coffee was transformed from a botanical curiosity to the region's most important export. In spite of their geographic proximity, the national governments that