In this article Jo Guldi asks 'What is a participatory map and when did it emerge?'. She explores participatory democracy's search for new techniques and traces the history of participation going back to it's birth, through to its rise and fall in the West (1969-1978). She goes on to look at participation in social movements in the Global South in the 1970s, and highlights the rise of the walking tour in development economics. Map driven movements for control over cities and land are explored along with participatory maps online. Crucial elements such as power are considered in the context of mapping, and Jo also describes how collaborative maps became an indigenous tool for the Cree of North America when facing legal contestation of their native land.