The Colorado River Basin's importance cannot be overstated. Its living river system supplies water to roughly forty million people, contains Grand Canyon National Park, Bears Ears National Monument, and wide swaths of other public lands, and encompasses ancestral homelands of twenty-nine Native American tribes. John Wesley Powell, a one-armed Civil War veteran, explorer, scientist, and adept federal administrator, articulated a vision for Euro-American colonization of the "Arid Region" that has indelibly shaped the basin-a pattern that looms large not only in western history, but also in contemporary environmental and social policy. One hundred and fifty years after Powell's epic 1869 Colorado River Exploring Expedition, this volume revisits Powell's vision, examining its historical character and its relative influence on the Colorado River Basin's cultural and physical landscape in modern times. In three parts, the volume unpacks Powell's ideas on water, public lands, and Native Americans-ideas at once innovative, complex, and contradictory. With an eye toward climate change and a host of related challenges facing the basin, the volume turns to the future, reflecting on how-if at all-Powell's legacy might inform our collective vision as we navigate a new "Great Unknown."

The labor of turtle hunters and the shaping of Caribbean history. Illuminating the entangled histories of the people and commodities that circulated across the Atlantic, Sharika D. Crawford assesses the Caribbean as a waterscape where imperial and national governments vied to control the profitability of the sea. Crawford places the green and hawksbill sea turtles and the Caymanian turtlemen who hunted them at the center of this waterscape. The story of the humble turtle and its hunter, she argues, came to play a significant role in shaping the maritime boundaries of the modern Caribbean. Crawford describes the colonial Caribbean as an Atlantic commons where all could compete to control the region's diverse peoples, lands, and waters and exploit the region's raw materials. Focusing on the nineteenth and twentieth centuries, Crawford traces and connects the expansion and decline of turtle hunting to matters of race, labor, political and economic change, and the natural environment. Like the turtles they chased, the boundary-flouting laborers exposed the limits of states' sovereignty for a time but ultimately they lost their livelihoods, having played a significant role in legislation delimiting maritime boundaries. Still, former turtlemen have found their deep knowledge valued today in efforts to protect sea turtles and recover the region's ecological sustainability.