No two nations have exchanged natural resources, produced transborder environmental agreements, or cooperatively altered ecosystems on the same scale as Canada and the United States. Environmental and energy diplomacy have profoundly shaped both countries’ economies, politics, and landscapes for over 150 years.
Natural Allies looks at the history of US-Canada relations through an environmental lens. From fisheries in the late nineteenth century to oil pipelines in the twenty-first century, Daniel Macfarlane recounts the scores of transborder environmental and energy arrangements made between the two nations. Many became global precedents that influenced international environmental law, governance, and politics, including the Boundary Waters Treaty, the Trail Smelter case, hydroelectric megaprojects, and the Great Lakes Water Quality Agreements. In addition to water, fish, wood, minerals, and myriad other resources, Natural Allies details the history of the continental energy relationship – from electricity to uranium to fossil fuels –showing how Canada became vital to American strategic interests and, along with the United States, a major international energy power and petro-state.
Environmental and energy relations facilitated the integration and prosperity of Canada and the United States but also made these countries responsible for the current climate crisis and other unsustainable forms of ecological degradation. Looking to the future, Natural Allies argues that the concept of national security must be widened to include natural security – a commitment to public, national, and international safety from environmental harms, especially those caused by human actions.

Daniel Macfarlane is an Assistant Professor with the Institute of the Environment and Sustainability at Western Michigan University. His research examines Canada-US border waters and he is the author of Negotiating a River, Canada, the US and the Creation of the St. Lawrence Seaway.

Daniel Macfarlane's profile page

• Winner, Best Book in Political History Prize
• Short-listed, Wilson Institute Book Prize

“Natural Allies is a sweeping book that redefines our understanding of Canada-US relations since 1867 as well as environmental diplomacy more broadly. There is no other book like it, and it will provide a useful new perspective to anyone studying or interested in foreign policy or environmental issues in North America.” Kurk Dorsey, University of New Hampshire and author of The Dawn of Conservation Diplomacy: US-Canadian Wildlife Protection Treaties in the Progressive Era

"Daniel MacFarlane’s Natural Allies is a fascinating and often delightfully funny exploration of energy and environmental diplomacy along the US-Canada border. The book also offers substantial new insight for environmental historians on the significance of diplomacy, and for diplomatic and political historians on the centrality of environment. It is well-worth a read by members of either group." NiCHE