ABSTRACT The foundation of the Child Poverty Action Group (CPAG) in 1965 is seen as a pivotal moment in the history of British welfare policy heralding a new wave of pressure group activism. Many histories of the organisation focus on the expertise of two of their founder members, Brian Abel-Smith and Peter Towsend. But in foregrounding the role of these academic experts in the early history of CPAG the wider ecosystem of professionals, academics, politicians and activists involved has been overshadowed. This insight this article will argue that contributions to welfare policy and practice can be subsumed in organisational histories, particularly work that is local, smaller scale and practical. Often though not exclusively, women have undertaken such grassroots research and activism. Such work can, and does, contribute to the success of voluntary groups as well as feed into wider intellectual and policy currents. This paper will explore one such case study of this: the crucial but under-documented work of three women campaigners Harriett Wilson, Audrey Harvey and Margaret Wynn. It will illustrate how by combining both intellectually rigorous social research and practical social action they were important both in the formation of CPAG and sociological thinking and practice more broadly.