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.

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

This is a masterly theoretical treatment of one of the central problems in evolutionary biology, the evolution of social cooperation and conflict. Steven Frank tackles the problem with a highly original combination of approaches: game theory, classical models of natural selection, quantitative genetics, and kin selection. He unites these with the best of economic thought: a clear theory of model formation and comparative statics, the development of simple methods for analyzing complex problems, and notions of information and rationality. Using this unique, multidisciplinary approach, Frank makes major advances in understanding the foundations of social evolution. Frank begins by developing the three measures of value used in biology--marginal value, reproductive value, and kin selection. He then combines these measures into a coherent framework, providing the first unified analysis of social evolution in its full ecological and demographic context. Frank also extends the theory of kin selection by showing that relatedness has two distinct meanings. The first is a measure of information about social partners, with close affinity to theories of correlated equilibrium and Bayesian rationality in economic game theory. The second is a measure of the fidelity by which characters are transmitted to future generations--an extended notion of heritability. Throughout, Frank illustrates his methods with many examples, including a complete reformulation of the theory of sex allocation. The book also provides a unique "how-to" guide for constructing models of social behavior. It is essential reading for evolutionary biologists and for economists, mathematicians, and others interested in natural selection.

Historical Materialism and Social Evolution brings together a collection of essays which investigate the relationship between Marxist thought and Darwin's theory of evolution by natural selection. Each of the contributors emphasize the idea that the distinctive character of progressive social thought is derived from creative ideas drawn from the study of natural evolutionary processes.

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.