Deepak Kumar is a geopolitical analyst and author focusing on strategic competition, deterrence theory and the transformation of conflict in the 21st century. His work examines how technological change, institutional resilience and shifting power balances reshape global order and military doctrine. He is the author of three books on power transitions and governance in the contemporary international system, including The Intelligence Threshold: The Last Age of Human Control and The Invisible Leviathan. His analysis explores how emerging technologies, hybrid warfare and systemic rivalry are altering the architecture of global security and the strategic calculations of states.