Ken Heibert was an organizational member of the Vancouver branche of Socialist Challenge/Gauche socialiste, acting for over ten years as the minute taker at branch meetings and evidently keeping many documents and records related to the organization and its activist activity. Socialist Challenge/Gauche Socialiste was an organization dedicated to building popular revolutionary socialism in the Canadian state in the tradition of Marx, Engels, Lenin and Trotsky, while also embracing socialist feminism, democracy, and other progressive social movements like gay and lesbian rights. In particular, as evidenced in this collection, the organization was partial to the separatist movement of Quebec, understanding this movement as a right to political sovereignty and arising, as this organization saw it, in response to political opression within an Anglophone dominated Canada. The Vancouver branch, as evidenced in this collection, was predominately active in the 1990's and were involved in a number of political campaigns on issues such as anti-capitalist protest against expansion of international free trade, Clayoquot protests ("War of the Woods"), pro-choice abortion campaigns, and anti-fascism. Involvement included production of promotional materials, protest attendance, convening conferences and other educational events.