This entry examines the critical intersection between psychological safety and Diversity, Equity, Inclusion, Belonging, and Accessibility (DEIBA) principles in organizational contexts. Beginning with operational definitions of both frameworks, we explore how psychological safety, an environment where people believe candor is welcome without fear of punishment, serves as the essential foundation upon which meaningful DEIBA initiatives can flourish. The symbiotic relationship between these approaches creates conditions where diverse perspectives not only exist but also actively contribute to organizational success. We briefly analyze both the advantages of this integration, including improved team communication, enhanced employee well-being, and higher-quality decision-making, as well as potential pitfalls and misapplications that organizations commonly encounter. The entry then presents practical strategies for establishing psychological safety as the foundation for DEIBA initiatives, highlighting the crucial role of leadership behaviors, accountability mechanisms, and opportunities for education and self-awareness. We conclude by addressing how organizations can navigate implementation challenges and distinguish between genuine psychological safety and misconceptions that undermine its effectiveness in supporting diverse and inclusive environments. Throughout, we emphasize that psychological safety is not the absence of standards or accountability, but rather the presence of a culture where growth, learning, and authentic contribution become the pathway to both individual and collective excellence.