The Evolution Of Individuality

Leo Buss expounds a general theory of development through a simple hierarchical extension of the synthetic theory of evolution. He perceives innovations in development to have evolved in ancestral organisms where the germ line was not closed to genetic variation arising during the course of ontogeny. Originally published in 1988. The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.

The biological and philosophical implications of the emergence of new collective individuals from associations of living beings. Our intuitive assumption that only organisms are the real individuals in the natural world is at odds with developments in cell biology, ecology, genetics, evolutionary biology, and other fields. Although organisms have served for centuries as nature's paradigmatic individuals, science suggests that organisms are only one of the many ways in which the natural world could be organized. When living beings work together—as in ant colonies, beehives, and bacteria-metazoan symbiosis—new collective individuals can emerge. In this book, leading scholars consider the biological and philosophical implications of the emergence of these new collective individuals from associations of living beings. The topics they consider range from metaphysical issues to biological research on natural selection, sociobiology, and symbiosis. The contributors investigate individuality and its relationship to evolution and the specific concept of organism; the tension between group evolution and individual adaptation; and the structure of collective individuals and the extent to which they can be defined by the same concept of individuality. These new perspectives on evolved individuality should trigger important revisions to both philosophical and biological conceptions of the individual. Contributors Frédéric Bouchard, Ellen Clarke, Jennifer Fewell, Andrew Gardner, Peter Godfrey-Smith, Charles J. Goodnight, Matt Haber, Andrew Hamilton, Philippe Huneman, Samir Okasha, Thomas Pradeu, Scott Turner, Minus van Baalen

Individuals are things that everybody knows—or thinks they do. Yet even scholars who practice or analyze the biological sciences often cannot agree on what an individual is and why. One reason for this disagreement is that the many important biological individuality concepts serve very different purposes—defining, classifying, or explaining living structure, function, interaction, persistence, or evolution. Indeed, as the contributors to Biological Individuality reveal, nature is too messy for simple definitions of this concept, organisms too quirky in the diverse ways they reproduce, function, and interact, and human ideas about individuality too fraught with philosophical and historical meaning. Bringing together biologists, historians, and philosophers, this book provides a multifaceted exploration of biological individuality that identifies leading and less familiar perceptions of individuality both past and present, what they are good for, and in what contexts. Biological practice and theory recognize individuals at myriad levels of organization, from genes to organisms to symbiotic systems. We depend on these notions of individuality to address theoretical questions about multilevel natural selection and Darwinian fitness; to illuminate empirical questions about development, function, and ecology; to ground philosophical questions about the nature of organisms and causation; and to probe historical and cultural circumstances that resonate with parallel questions about the nature of society. Charting an interdisciplinary research agenda that broadens the frameworks in which biological individuality is discussed, this book makes clear that in the realm of the individual, there is not and should not be a direct path from biological paradigms based on model organisms through to philosophical generalization and historical reification.

In Pathways to Individuality, veteran researcher and scholar Arnold Buss examines the personality traits we share with other animals-and those that set us apart from other animals, the social traits that make us distinctly human. Within those general social traits, there's much variability, as Buss explains in this new book, usually differentiated during the crucial periods of human development-and that's what makes us individuals. Humans make up the only species that has an extended period of childhood-we play and explore more than other animals-during which our human traits become canalized and differentiated: Our early interactions with our social environment influence and sharpen the neural and behavioral pathways that distinguish our distinct individuality. In turn, we seek to influence those environments we are drawn to and that help shape our individuality. Drawing from his own published research over a half-century of teaching and writing on personality, Buss masterfully summarizes key theories and recent advances in the study of temperament (aggression, dominance, etc.), the self (self-conscious shyness, self-esteem, identity), and abnormal behavior and style as crucial dimensions in understanding personality and individual differences.

The modern West has made the focus on individuality, individual freedom, and self-identity central to its self-definition, and these concepts have been crucially shaped by Christianity. This book surveys how the birth of the Christian worldview affected the evolution of individualism in Western culture as a cultural meme. Applying a biological metaphor and Richard Dawkins’ definition of a meme, this work argues the advent of individualism was not a sudden innovation of the Renaissance or the Enlightenment, but a long evolution with characteristic traits. This evolution can be mapped using profiles of individuals in different historical eras who contributed to the modern notion of individualism. Utilizing excerpts from original works from Augustine to Nietzsche, a compelling narrative arises from the slow but steady evolution of the modern self. The central argument is that Christianity, with its characteristic inwardness, was fundamental in the development of a sense of self as it affirmed the importance of the everyday man and everyday life.

In the first chapter, we argue that an individual organism ought not to be defined in terms of genetic homogeneity, but rather by the evolutionary criteria of the alignment of fitness interests, the export of fitness due to interdependence for survival and reproduction, and adaptive functional organization. We consider how these concepts apply to various putative individual organisms, review the costs and benefits of intraorganismal genetic heterogeneity, and demonstrate that high relatedness is neither necessary nor sufficient for individuality. In the second chapter, we model the benefits and costs of genetic mosaicism for a long-lived tree in coevolution with a short-lived pest. We demonstrate benefits of mosaicism for trees at both the individual and population levels when somatic mutation introduces new defenses. In the third chapter, we develop a game theoretic model of the decision to reject or fuse with a potential partner in a colonial ascidian, based on weighing costs and benefits of fusion. We find that once fused, the interactions between cell lineages are cooperative in the soma, but competitive in the germline.

A richly transdisciplinary account of some fundamental characteristics of human societies and behavior In this book, acclaimed economist Herbert Gintis ranges widely across many fields—including economics, psychology, anthropology, sociology, moral philosophy, and biology—to provide a rigorous transdisciplinary explanation of some fundamental characteristics of human societies and social behavior. Because such behavior can be understood only through transdisciplinary research, Gintis argues, Individuality and Entanglement advances the effort to unify the behavioral sciences by developing a shared analytical framework—one that bridges research on gene-culture coevolution, the rational-actor model, game theory, and complexity theory. At the same time, the book persuasively demonstrates the rich possibilities of such transdisciplinary work. Everything distinctive about human social life, Gintis argues, flows from the fact that we construct and then play social games. Indeed, society itself is a game with rules, and politics is the arena in which we affirm and change these rules. Individuality is central to our species because the rules do not change through inexorable macrosocial forces. Rather, individuals band together to change the rules. Our minds are also socially entangled, producing behavior that is socially rational, although it violates the standard rules of individually rational choice. Finally, a moral sense is essential for playing games with socially constructed rules. People generally play by the rules, are ashamed when they break the rules, and are offended when others break the rules, even in societies that lack laws, government, and jails. Throughout the book, Gintis shows that it is only by bringing together the behavioral sciences that such basic aspects of human behavior can be understood.

This book is about the psychology of acute culture change based on the historical antecedents of such events. It focuses on the spiritual process and the social circumstances of stressful turning points.