Former Rolling Stone associate editor Robert Greenfield compared the Beatles to Picasso, as "artists who broke through the constraints of their time period to come up with something that was unique and original ... [I]n the form of popular music, no one will ever be more revolutionary, more creative and more distinctive..." The British poet Philip Larkin described their work as "an enchanting and intoxicating hybrid of Negro rock-and-roll with their own adolescent romanticism", and "the first advance in popular music since the War".They not only sparked the British Invasion of the United States, they became a globally influential phenomenon as well. From the 1920s, the United States had dominated popular entertainment culture throughout much of the world, via Hollywood movies, jazz, the music of Broadway and Tin Pan Alley and, later, the rock and roll that first emerged in Memphis, Tennessee. The Beatles are regarded as British cultural icons, with young adults from abroad naming the band among a group of people that they most associated with UK culture.Their musical innovations and commercial success inspired musicians worldwide. Many artists have acknowledged the Beatles' influence and enjoyed chart success with covers of their songs. On radio, their arrival marked the beginning of a new era; in 1968 the programme director of New York's WABC radio station forbade his DJs from playing any "pre-Beatles" music, marking the defining line of what would be considered oldies on American radio. They helped to redefine the album as something more than just a few hits padded out with "filler", and they were primary innovators of the modern music video. The Shea Stadium show with which they opened their 1965 North American tour attracted an estimated 55,600 people, then the largest audience in concert history; Spitz describes the event as a "major breakthrough ... a giant step toward reshaping the concert business". Emulation of their clothing and especially their hairstyles, which became a mark of rebellion, had a global impact on fashion.According to Gould, the Beatles changed the way people listened to popular music and experienced its role in their lives. From what began as the Beatlemania fad, the group's popularity grew into what was seen as an embodiment of sociocultural movements of the decade. As icons of the 1960s counterculture, Gould continues, they became a catalyst for bohemianism and activism in various social and political arenas, fuelling movements such as women's liberation, gay liberation and environmentalism. According to Peter Lavezzoli, after the "more popular than Jesus" controversy in 1966, the Beatles felt considerable pressure to say the right things and "began a concerted effort to spread a message of wisdom and higher consciousness".Other commentators such as Mikal Gilmore and Todd Leopold have traced the inception of their socio-cultural impact earlier, interpreting even the Beatlemania period, particularly on their first visit to the United States, as a key moment in the development of generational awareness. Referring to their appearance on the Ed Sullivan Show Leopold states: "In many ways, the Sullivan appearance marked the beginning of a cultural revolution...The Beatles were like aliens dropped into the United States of 1964". According to Gilmore:

Question: What was the term used to describe the sociocultural movement the Beatles instilled?
Answer: the Beatlemania fad