The U.S. is unprepared for a future of human-centric warfare. Its military doctrine acknowledges morale and other psychological factors but does not provide guidance on how to shape it. This represents a disconnect between war as a material affair and war as a human affair. Such a misconception of warfare leaves the U.S. and its allies vulnerable to adversaries and enemies seeking to exploit this lacuna. The U.S. therefore critically constrains itself despite its material strengths if it fails to embrace a psychologically grounded view of war.