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One of the most shocking realizations of all time has slowly been dawning on us: the earth's climate does great flip-flops every few thousand years, and with breathtaking speed. In just a few years, the climate suddenly cools worldwide. With only half the rainfall, severe dust storms whirl across vast areas. Lightning strikes ignite giant forest fires. For most mammals, including our ancestors, populations crash.

Our ancestors lived through hundreds of such abrupt episodes since the more gradual Ice Ages began two and a half million years ago—but abrupt cooling produced a population bottleneck each time, one that eliminated most of their relatives. We are the improbable descendants of those who survived—and later thrived.

William H. Calvin's marvelous A Brain for All Seasons argues that such cycles of cool, crash, and burn powered the pump for the enormous increase in brain size and complexity in human beings. Driven by the imperative to adapt within a generation to "whiplash" climate changes where only grass did well for a while, our ancestors learned to cooperate and innovate in hunting large grazing animals.

Calvin's book is structured as a travelogue that takes us around the globe and back in time. Beginning at Darwin's home in England, Calvin sits under an oak tree and muses on what controls the speed of evolutionary "progress." The Kalahari desert and the Sterkfontein caves in South Africa serve as the backdrop for a discussion of our ancestors' changing diets. A drought-shrunken lake in Kenya shows how grassy mudflats become great magnets for grazing animals. And in Copenhagen, we learn what ice cores have told us about abrupt jumps in past climates.

Perhaps the most dramatic discovery of all, though, awaits us as we fly with Calvin over the Gulf Stream and Greenland: global warming caused by human-made pollution could paradoxically trigger another sudden episode of global cooling. Because of the accumulation of greenhouse gases in the atmosphere, the oceanic "conveyor belt" that sends warmer waters into the North Atlantic could abruptly shut down. If that happens again, much of the Earth could be plunged into a deep chill within a few years. Europe would become as cold and dry as Siberia. Agriculture could not adapt quickly enough to avoid worldwide famines and wars over the dwindling food supplies—a crash from which it would take us many centuries to recover.

With this warning, Calvin connects us directly to evolution and the surprises it holds. Highly illustrated, conversational, and learned, A Brain for All Seasons is a fascinating view of where we came from, and where we're going.

Indigenous nations are on the front line of the climate crisis. With cultures and economies among the most vulnerable to climate-related catastrophes, Native peoples are developing twenty-first century responses to climate change that serve as a model for Natives and non-Native communities alike.

Native American tribes in the Pacific Northwest and Indigenous peoples around the Pacific Rim have already been deeply affected by droughts, flooding, reduced glaciers and snowmelts, seasonal shifts in winds and storms, and the northward movement of species on the land and in the ocean. Using tools of resilience, Native peoples are creating defenses to strengthen their communities, mitigate losses, and adapt where possible.

Asserting Native Resilience presents a rich variety of perspectives on Indigenous responses to the climate crisis, reflecting the voices of more than twenty contributors, including tribal leaders, scientists, scholars, and activists from the Pacific Northwest, British Columbia, Alaska, and Aotearoa / New Zealand, and beyond. Also included is a resource directory of Indigenous governments, NGOs, and communities and a community organizing booklet for use by Northwest tribes.

With three roads and a population of just over 500 people, Shishmaref, Alaska seems like an unlikely center of the climate change debate. But the island, home to Iñupiaq Eskimos who still live off subsistence harvesting, is falling into the sea, and climate change is, at least in part, to blame. While countries sputter and stall over taking environmental action, Shishmaref is out of time.

Publications from the New York Times to Esquire have covered this disappearing village, yet few have taken the time to truly show the community and the two millennia of traditions at risk. In Fierce Climate, Sacred Ground, Elizabeth Marino brings Shishmaref into sharp focus as a place where people in a close-knit, determined community are confronting the realities of our changing planet every day. She shows how physical dangers challenge lives, while the stress and uncertainty challenge culture and identity. Marino also draws on Shishmaref’s experiences to show how disasters and the outcomes of climate change often fall heaviest on those already burdened with other social risks and often to communities who have contributed least to the problem. Stirring and sobering, Fierce Climate, Sacred Ground proves that the consequences of unchecked climate change are anything but theoretical.

In The Great Maya Droughts in Cultural Context, contributors reject the popularized link between societal collapse and drought in Maya civilization, arguing that a series of periodic “collapses,” including the infamous Terminal Classic collapse (AD 750–1050), were not caused solely by climate change–related droughts but by a combination of other social, political, and environmental factors. New and senior scholars of archaeology and environmental science explore the timing and intensity of droughts and provide a nuanced understanding of socio-ecological dynamics, with specific reference to what makes communities resilient or vulnerable when faced with environmental change.Contributors recognize the existence of four droughts that correlate with periods of demographic and political decline and identify a variety of concurrent political and social issues. They argue that these primary underlying factors were exacerbated by drought conditions and ultimately led to societal transitions that were by no means uniform across various sites and subregions. They also deconstruct the concept of “collapse” itself—although the line of Maya kings ended with the Terminal Classic collapse, the Maya people and their civilization survived.

The Great Maya Droughts in Cultural Context offers new insights into the complicated series of events that impacted the decline of Maya civilization. This significant contribution to our increasingly comprehensive understanding of ancient Maya culture will be of interest to students and scholars of archaeology, anthropology, geography, and environmental studies.

The Anthropological Papers of the University of Arizona is a peer-reviewed monograph series sponsored by the School of Anthropology. Established in 1959, the series publishes archaeological and ethnographic papers that use contemporary method and theory to investigate problems of anthropological importance in the southwestern United States, Mexico, and related areas.

Archaeologists have long encountered evidence of natural disasters through excavation and stratigraphy. In Surviving Sudden Environmental Change, case studies examine how eight different past human communities-ranging from Arctic to equatorial regi