The Barrier of the Four-Minute Mile

Breaking the four-minute mile has become a significant metaphor for overcoming seemingly impossible barriers, as exemplified by Roger Bannister's historic achievement in 1954. Prior to Bannister, many athletes had come close to this milestone, yet none had succeeded, leading to a pervasive belief that it couldn't be done. However, Bannister's success triggered what is known as the 'Bannister effect,' where subsequent runners quickly followed suit, breaking the barrier themselves within weeks and months. This phenomenon demonstrates how the perceptions of possibility can shift dramatically once a major milestone is achieved.