On Sunday, May 30, 1:30-3:00 p.m. US Eastern Time, General Sir Rupert Smith (UK, ret.) talked about “Reflections on Colin Gray’s Maxim 19 in the Light of Experience.”
The relevant reading ("All Strategy is Geostrategy: Geography is Fundamental") may be found in Colin S. Gray's Fighting Talk: Forty Maxims on War, Peace and Strategy (Potomac Books, Inc., 2009), 78-81.
General Smith considered Colin Gray's Maxim 19, drawing on his experience to illustrate its use to the strategist. Inter alia, he discussed the relationship of geography to tactics and strategy; the increasing need for human geography to be considered as well as the physical; and the urgent need for Maxim 19 to be comprehended and applied, as we think through the strategies for operating in cyberspace and a rapidly changing climate.
General Smith is the author of The Utility of Force: The Art of War in the Modern World (Knopf, 2007). For his biography, please see: https://en.wikipedia.org/wiki/Rupert_Smith.