This research examines the relationship between Diversity, Equity, and Inclusion (DEI) strategies and organizational performance across global business environments. Through extensive analysis of empirical studies, international corporate case examples, and industry best practices, this study demonstrates that effectively implemented DEI initiatives contribute significantly to enhanced organizational outcomes, including increased innovation, improved financial performance, higher employee engagement, and expanded market reach. The paper addresses implementation challenges with particular focus on leadership account-ability frameworks and strategies to prevent diversity fatigue while main-training long-term employee engagement. This analysis provides valuable insights for business leaders seeking to leverage DEI as a strategic advantage while navigating cultural and regulatory differences across international markets.