This article re-visits contestation and critique over the nationwide introduction of comprehensive secondary schools in post-war England. In so doing, it considers the contribution of scholar-activist Caroline Benn (1926--2000) and a network of progressive educators who were challenging ideas about fixed ability or potential and aspiring to build a better, more inclusive education system fit for the times. The recent availability of Benn's personal papers opens an opportunity for a deeper understanding of the politics of comprehensive education, to consider the meaning and significance of the policy as our historical perspective lengthens, notably the question of whether legislation was needed to implement so major a reform and foster cultural change in a society characterized by substantial inequalities in income, status and power. It will be argued that we need to challenge contemporary political narratives that seek to normalize academic selection as a force for social justice and high attainment and maintain a belief in the myth of meritocracy.