1966 – 1970: controversy, studio years and break-up

 Events leading up to final tour

In June 1966, Yesterday and Today—one of the compilation albums created by Capitol Records for the US market—caused an uproar with its cover, which portrayed the grinning Beatles dressed in butcher's overalls, accompanied by raw meat and mutilated plastic baby dolls. It has been suggested that this was meant as a satirical response to the way Capitol had "butchered" the US versions of their albums. Thousands of copies of the album had a new cover pasted over the original; an unpeeled "first-state" copy fetched $10,500 at a December 2005 auction. In England, meanwhile, Harrison met sitar maestro Ravi Shankar, who agreed to train him on the instrument.

During a tour of the Philippines the month after the Yesterday and Today furore, the Beatles unintentionally snubbed the nation's first lady, Imelda Marcos, who had expected them to attend a breakfast reception at the Presidential Palace. When presented with the invitation, Epstein politely declined on the band members' behalf, as it had never been his policy to accept such official invitations. They soon found that the Marcos regime was unaccustomed to taking no for an answer. The resulting riots endangered the group and they escaped the country with difficulty. Immediately afterward, the band members visited India for the first time.

Almost as soon as they returned home, they faced a fierce backlash from US religious and social conservatives (as well as the Ku Klux Klan) over a comment Lennon had made in a March interview with British reporter Maureen Cleave: "Christianity will go," Lennon said. "It will vanish and shrink. I needn't argue about that; I'm right and I will be proved right. We're more popular than Jesus now; I don't know which will go first, rock 'n' roll or Christianity. Jesus was alright but his disciples were thick and ordinary. It's them twisting it that ruins it for me." The comment went virtually unnoticed in England, but when US teenage fan magazine Datebook printed it five months later—on the eve of the group's August US tour—it sparked a controversy with Christians in the American "Bible Belt". The Vatican issued a protest, and bans on Beatles' records were imposed by Spanish and Dutch stations and South Africa's national broadcasting service. Epstein accused Datebook of having taken Lennon's words out of context; at a press conference Lennon pointed out, "If I'd said television was more popular than Jesus, I might have got away with it." Lennon claimed he was referring to how other people viewed their success, but at the prompting of reporters, he concluded, "If you want me to apologize, if that will make you happy, then okay, I'm sorry."

As preparations were made for the US tour, the Beatles knew that their music would hardly be heard. Having originally used Vox AC30 amplifiers, they later acquired more powerful 100-watt amplifiers, specially designed by Vox for them as they moved into larger venues in 1964, but these were still inadequate. Struggling to compete with the volume of sound generated by screaming fans, the band had grown increasingly bored with the routine of performing live. Recognizing that their shows were no longer about the music, they decided to make the August tour their last.