In today's complex, volatile, and uncertain world, organizations and individuals must increasingly move beyond siloed thinking. This talk introduces polymathy as a vital yet underexplored construct in management and the behavioral sciences. Polymathy is defined as an expansive way of being in the pursuit, development, and application of knowledge, whose expansiveness is characterized by the conjunction of breadth, depth, and integration. Drawing on a lineage from Ancient Greece through the Renaissance to the present, I argue that polymathy is not a relic of the past but a contemporary mode of learning, thinking, and acting with pressing relevance. I present two key contributions: the Polymathic Orientation (PO) Scale, the first validated instrument to measure polymathy as a personal disposition, and the Developmental Model of Polymathy (DMP), which explains the path from orientation to knowledgebase to creation. Empirical evidence shows that polymathic orientation predicts creativity across all four stages of the innovation process—idea generation, development, championing, and implementation—beyond established personality traits like Openness to Experience. By surfacing both the promise and the tensions of polymathy, this line of work opens a new agenda for understanding creativity, innovation, leadership, and human flourishing in organizations