The Journal of Global History has just released my new article written with Julie Cohn and Marc Landry, “Water powers: the Second World War and the mobilization of hydroelectricity in Canada, the United States and Germany”.  The paper originated in a session at the American Society for Environmental History when Julie, Marc and I presented stand alone papers, each tackling a different country but with similar questions.  The striking parallels and differences led us to dive more deeply into the comparisons.  The resulting paper throws fresh light on each case and argues for the significance of hydro power to the war and of the war to the evolution of electrical systems.