This volume aims to present the essential work of geographer and historical ecologist William M. Denevan to explain the impact and influence his thinking had on the conceptual advancement not only in his own discipline, but in a range of related disciplines such as anthropology, archaeology, and environmental history. The book is organized around eight themes, demonstrating Denevan’s early and profound insights on topics that remain of current relevance today, and the scholarly impact his writing had on subsequent scholarship. The book is unique because it offers commentary from active scholars who address the impacts of Prof. Denevan's thinking and work on contemporary environmental and ecological issues, with a focus on several groundbreaking themes (e.g. historical demography, agricultural landforms, cultural plant geography, human environmental impacts, indigenous agro-ecology, tropical agriculture, livestock and landscape, and synthetic contributions). This book will be of interest to a range of scholars in geography, anthropology, archaeology, history, and ecology, as well as to environmental managers and practitioners, especially those working for non-profit organizations and government organizations tasked with finding ways to adapt to global environmental change.