Last week I heard from Professor Theo Farrell on Twitter that noted defence and military strategist Professor Colin S. Gray had passed away. Gray’s stature in Anglo-American strategic thought was apparent to me when Strategic and Defence Studies Centre staff at The Australian National University spoke highly of Gray’s work on the “strategic imagination.” Chapters 1 and 3 of my forthcoming PhD thesis explore Gray’s early Hudson Institute work on strategic culture and my research management informed solution to the so-called Gray-Johnston debate. I look forward to engaging with Gray’s rich legacy of strategic thought.