In August of 1966, after years of relentless touring, the Beatles found themselves grappling with inadequate sound systems, raucous, screaming fans, and the inability to hear themselves play. Their music was getting increasingly complex, but it could not be performed live due to the limitations of the technology of the time. And so, John Lennon, Paul McCartney, George Harrison, and Ringo Starr made the pivotal decision to stop touring. This could have spelled the end for the Beatles.