The stock Beatles narrative attributes this change in John to the arrival in his lifeand in the recording studioof Yoko Ono. Yoko is also often blamed for breaking up the band, of course. But the crucial point is how John used Yoko to reassert his power. It was an alpha movehis way of reminding the others that he could summarily add a member to the band, just as he had decided to ask Paul to join the Quarry Men 11 years earlier. Once Yoko was on the scene, she naturally began to exert her own influence, and over time she did become a wedge between John and Paul.