The strongest teams don’t succeed because they avoid conflict—they succeed because they understand how teammates process information, communicate under pressure, and approach decisions differently. Drawing on a redesign of Harvard Business School’s FIELD Global Immersion program, the authors argue that “interpersonal competence” is a learnable capability that helps teams anticipate and navigate cognitive differences before they become performance problems. After introducing training and tools designed to build that capability, the number of student teams requiring faculty intervention for serious collaboration breakdowns fell from 45 to one.