Nothing good lasts forever, and that includes The Beatles. They had a string of hit albums throughout the 1960s, but personal and artistic differences caused the band to splinter by the end of the decade before they broke up for good in 1970. No one member necessarily caused the band to break up, but Paul McCartney once revealed the public casting him as a villain of the Beatles’ break-up had him believing it was true until he saw one photo of him and John Lennon together.
With hindsight being 20-20, one could trace the threads of the Beatles’ break-up back to their early days. The band had conflict even when they were just four lads looking to build their fan base, such as Paul and George Harrison arguing about car keys for two hours.
By the end of the 1960s, however, each member had solo work in mind, and the Fab Four also had different opinions about how to run their shared business interests. The death of their strong-willed manager Brian Epstein also threw the band into disarray. There was no one cause for why the Beatles broke up; it was a collection of problems that caused their split.
Source: Jason Rossi/cheatsheet.com