Diversity and inclusion initiatives have become increasingly prevalent in organizations worldwide, driven by the recognition of their potential to promote positive organizational behavior and enhance performance. This paper provides a comprehensive exploration of the effectiveness of diversity and inclusion initiatives in fostering positive organizational behavior. It begins with an overview of diversity and inclusion concepts, including definitions, types, and the importance of inclusion in the workplace. Theoretical frameworks such as Social Identity Theory and the Contact Hypothesis are examined to understand the underlying mechanisms driving diversity and inclusion outcomes