During the 1960s, London underwent a "metamorphosis from a gloomy, grimy post-war capital into a bright, shining epicentre of style". The phenomenon was caused by the large number of young people in the city (due to the baby boom of the 1950s) and the postwar economic boom. Following the abolition of the national service for men in 1960, these young people enjoyed greater freedom and fewer responsibilities than their parents' generation, and " changes to social and sexual politics". Despite shaping the popular consciousness of Britain in the 1960s, however, Swinging London was a West End-centred phenomenon that only happened among young, middle class people, and was considered "simply a diversion" by some of them. The swinging scene also served as a consumerist counterpart to the countercultural British underground of the same period. Simon Rycroft writes: "Whilst it is important to acknowledge the exclusivity and the dissenting voices, it does not lessen the importance of Swinging London as a powerful moment of image making with very real material effect."