This document reviews peer-reviewed research on the unconscious mind and unconscious bias, focusing particularly on unconscious bias training (UBT). It establishes that the unconscious mind is far more complex than previously thought, capable of sophisticated information processing and influencing behavior even before conscious awareness. Regarding unconscious bias, the research overwhelmingly shows its prevalence across various settings, especially healthcare, significantly impacting decisions and outcomes. While UBT shows some short-term success in raising awareness and potentially reducing implicit biases, its impact on long-term behavior change and workplace equality is limited and inconsistent. The document concludes that UBT is most effective as part of a broader, comprehensive diversity, equity, and inclusion (DEI) strategy, rather than a standalone solution, emphasizing the need for ongoing, well-designed interventions to address systemic issues.