In response to the political events and more turbulent atmosphere of 1968, the Beatles released "Revolution", in the lyrics to which Lennon espoused a pacifist agenda over violent confrontation. The song inspired the first in-depth debate regarding the connection between rock music and politics, where beforehand music journalists and political radicals in the US had mostly viewed their respective fields in isolation. Lennon's stance drew heavy criticism from New Left writers as the single's release coincided with the violent subjugation of Vietnam War protestors at the Democratic National Convention in Chicago, and condemnation in the West of the Soviet-led invasion of Czechoslovakia and its crushing of attempts to introduce democratic reforms there. With its more universal message, McCartney's "Hey Jude", the A-side of the single, was adopted as an anthem by Czech citizens in their struggle. "The Beatles" was similarly attacked by the radical left. While the counterculture adopted "Piggies" as an anti-establishment anthem, many radicals viewed the band's use of parody and satire throughout the album as evidence of their disengagement with pressing political issues.