The terrestrial organisms of the Galapagos Islands live under conditions unlike those anywhere else. At the edge of a uniquely rich mid-ocean upwelling, their world is also free of mammalian predators and competitors, allowing them to live unbothered, exuberant lives. With its giant tortoises, marine iguanas, flightless cormorants, and forests of giant daisies, there's no question that this is a magnificent place. Long before people traversed the Earth, evolution endowed native species with adaptations to these special conditions and to perturbations like El Nino events and periodic droughts. As the islands have grown ever-more connected with humanity, those same adaptations now make its species vulnerable. Today, the islands are best viewed as one big social-ecological system where the ability of each native organism to survive and reproduce is a product of human activity in addition to ecological circumstances. In this book, William H. Durham takes readers on a tour of Galapagos and the organisms that inhabit these isolated volcanic islands. Exuberant Life offers a contemporary synthesis of what we know about the evolution of its curiously wonderful organisms, how they are faring in the tumultuous changing world around them, and how evolution can guide our efforts today for their conservation. The book highlights the ancestry of a dozen specific organisms in these islands, when and how they made it to the Galapagos, as well as how they have changed in the meantime. Durham traces the strengths and weaknesses of each species, arguing that the mismatch between natural challenges of their habitats and the challenges humans have recently added is the main task facing conservation efforts today. Such analysis often provides surprises and suggestions not yet considered, like the potential benefits to joint conservation efforts between tree finches and tree daisies, or ways in which the peculiar evolved behaviors of Nazca and blue-footed boobies can be used to benefit both species today. In each chapter, a social-ecological systems framework is used to highlight links between human impact, including climate change, and species status today, Historically, the Galapagos have played a central role in our understanding of evolution; what these islands now offer to teach us about conservation may well prove indispensable for the future of the planet.

Is inbreeding harmful? Are human beings and other primates naturally inclined to mate with their closest relatives? Why is incest widely prohibited? Why does the scope of the prohibition vary from society to society? Why does incest occur despite the prohibition? What are the consequences? After one hundred years of intense argument, a broad consensus has emerged on the first two questions, but the debate over the others continues.
That there is a biological basis for the avoidance of inbreeding seems incontrovertible, but just how injurious inbreeding really is for successive generations remains an open question. Nor has there been any conclusion to the debate over Freud's view that the incest taboo is necessary because humans are sexually attracted to their closest relatives--a claim countered by Westermarck's argument for the sexually inhibiting effects of early childhood association.
This book brings together contributions from the fields of genetics, behavioral biology, primatology, biological and social anthropology, philosophy, and psychiatry which reexamine these questions.

Is inbreeding harmful? Are human beings and other primates naturally inclined to mate with their closest relatives? Why is incest widely prohibited? Why does the scope of the prohibition vary from society to society? Why does incest occur despite the prohibition? What are the consequences? After one hundred years of intense argument, a broad consensus has emerged on the first two questions, but the debate over the others continues.
That there is a biological basis for the avoidance of inbreeding seems incontrovertible, but just how injurious inbreeding really is for successive generations remains an open question. Nor has there been any conclusion to the debate over Freud's view that the incest taboo is necessary because humans are sexually attracted to their closest relatives--a claim countered by Westermarck's argument for the sexually inhibiting effects of early childhood association.
This book brings together contributions from the fields of genetics, behavioral biology, primatology, biological and social anthropology, philosophy, and psychiatry which reexamine these questions.

Looking at both population and land tenure dynamics in their historical context, this study challenges the view that the 1969 conflict between El Salvador and Honduras was primarily a response to population pressure. The author demonstrates that land scarcity, a principal cause of the war, was largely a product of the concentration of landholdings.
The analysis focuses on the emigration of 300,000 Salvadoreans to Honduras in the years before the war, inquiring into the reasons for the emigration, its impact on local agricultural economies, and its relation to the conflict. Answers to these questions are based on a new interpretation of national statistics and on original survey research in peasant communities. The author has used an interdisciplinary approach, drawing on the perspectives of anthropology, ecology, history, demography, and geography.
In addition to its value as a case study in human ecology, this book gives a clear account of the nature and origins of ecological pressures in rural Central America. The book is illustrated with 21 photographs and 7 maps.

Charles Darwin's "On the Origins of Species" had two principal goals: to show that species had not been separately created and to show that natural selection had been the main force behind their proliferation and descent from common ancestors. In "Coevolution," the author proposes a powerful new theory of cultural evolution--that is, of the descent with modification of the shared conceptual systems we call "cultures"--that is parallel in many ways to Darwin's theory of organic evolution.

The author suggests that a process of cultural selection, or preservation by preference, driven chiefly by choice or imposition depending on the circumstances, has been the main but not exclusive force of cultural change. He shows that this process gives rise to five major patterns or "modes" in which cultural change is at odds with genetic change. Each of the five modes is discussed in some detail and its existence confirmed through one or more case studies chosen for their heuristic value, the robustness of their data, and their broader implications. But "Coevolution" predicts not simply the existence of the five modes of gene-culture relations; it also predicts their relative importance in the ongoing dynamics of cultural change in particular cases. The case studies themselves are lucid and innovative reexaminations of an array of oft-pondered anthropological topics--plural marriage, sickle-cell anemia, basic color terms, adult lactose absorption, incest taboos, headhunting, and cannibalism.

In a general case, the author's goal is to demonstrate that an evolutionary analysis of both genes and culture has much to contribute to our understanding of human diversity, particularly behavioral diversity, and thus to the resolution of age-old questions about nature and nurture, genes and culture.

Charles Darwin's "On the Origins of Species" had two principal goals: to show that species had not been separately created and to show that natural selection had been the main force behind their proliferation and descent from common ancestors. In "Coevolution," the author proposes a powerful new theory of cultural evolution--that is, of the descent with modification of the shared conceptual systems we call "cultures"--that is parallel in many ways to Darwin's theory of organic evolution. The author suggests that a process of cultural selection, or preservation by preference, driven chiefly by choice or imposition depending on the circumstances, has been the main but not exclusive force of cultural change. He shows that this process gives rise to five major patterns or "modes" in which cultural change is at odds with genetic change. Each of the five modes is discussed in some detail and its existence confirmed through one or more case studies chosen for their heuristic value, the robustness of their data, and their broader implications. But "Coevolution" predicts not simply the existence of the five modes of gene-culture relations; it also predicts their relative importance in the ongoing dynamics of cultural change in particular cases. The case studies themselves are lucid and innovative reexaminations of an array of oft-pondered anthropological topics--plural marriage, sickle-cell anemia, basic color terms, adult lactose absorption, incest taboos, headhunting, and cannibalism. In a general case, the author's goal is to demonstrate that an evolutionary analysis of both genes and culture has much to contribute to our understanding of human diversity, particularly behavioral diversity, and thus to the resolution of age-old questions about nature and nurture, genes and culture.

An important and timely study of environmental degradation in Central and South America