Authority bias describes the human tendency to accept or adopt beliefs, decisions, and behaviors originating from figures with power, prestige, or status, without subjecting such claims to critical analysis. This chapter illustrates the phenomenon through Queen Victoria’s experience with chloroform during the birth of her eighth child in 1853, an event that facilitated the global acceptance of anesthesia at a time marked by deep scientific, religious, and cultural resistance. Despite overwhelming evidence of the benefits of ether and chloroform, many physicians in the United States and Europe remained skeptical and critical, influenced by tradition, beliefs, and professional jealousy. However, when the queen, the most influential woman in the world, successfully used chloroform under the supervision of John Snow, public perception changed dramatically, triggering a surge in demand for anesthesia even in contexts where it had previously been rejected. The chapter reviews the definition and psychological foundations of authority bias, from Stanley Milgram’s experiments to the contributions of Solomon Asch, and analyzes its effects on personal, collective, and medical practice. Finally, strategies are presented to mitigate this bias through critical thinking, independent evaluation, seeking diverse opinions, and evidence-based decision-making.