The River of the Big Canoes is a powerful and sobering exploration of the ecological transformation of the Missouri River and its once-thriving floodplain ecosystems. Drawing on decades of firsthand experience, scientific research, and historical accounts, Lawrence Hesse chronicles the profound environmental cost of human intervention-dams, channelization, levees, and land conversion-that has reshaped one of North America's greatest river systems. Once home to diverse habitats like cattail marshes, sandbars, and rich floodplain forests, the Missouri River ecosystem supported an extraordinary range of wildlife, including now-endangered species such as the scaleshell mussel and the interior least tern. Through a compelling narrative, the book reveals how natural river processes-flooding, sediment transport, and meandering-were essential to the river's health, and how their disruption has led to massive losses in biodiversity and habitat. Hesse exposes the unintended consequences of large-scale water development projects, including altered river flows, degraded fish spawning grounds, unnatural erosion, and the collapse of vital energy and nutrient cycles. He also highlights the cultural and policy failures that allowed these outcomes-where conservation promises were made but rarely kept, and environmental safeguards were overshadowed by development priorities. Despite the gravity of the subject, The River of the Big Canoes offers a call to action. With climate change threatening to further alter the Great Plains, Hesse emphasizes the need for sustainable water management, public engagement, and ecological restoration. Rich with insight, this book is both a tribute to the lost richness of the Missouri River and a passionate appeal to protect what remains. For readers interested in conservation, environmental history, or the complex relationship between humanity and nature, this is a vital and moving account of a river-and a legacy-we cannot afford to forget.