The Beatles' success was largely driven by the songwriting prowess of Paul McCartney and John Lennon. They were the dynamic duo behind the band's phenomenal success, whether they were co-writing or independently crafting songs before sharing them with each other.

Paul and John set the standard for songwriting in the 1960s, inspiring many of their peers. About their 1964 arrival in the United States, Bob Dylan said: "They were doing things nobody was doing. Their chords were outrageous, just outrageous, and their harmonies made it all valid. But I just kept it to myself that I really dug them.