This book provides an intellectual history of the modernist 'minimum dwelling', exploring how early modernism saw mass housing as a primary vehicle for achieving the utopian transformation of society. It reappraises the often-overlooked 2nd and 3rd CIAM conferences (1929-31), addressing their engagement with the 'minimum dwelling' and revealing them both as milestones in the organisation's annals and as seminal moments in the history of interwar modernism. In 1929, an eclectic international group of avant-garde modernist architects, including Ernst May, Mart Stam, Walter Gropius and Le Corbusier, met in Frankfurt for the second instalment of the CIAM conferences. They discussed a design programme for cost-effective, good-quality housing, seeking new approaches and processes to maximize quality and functionality while ensuring affordability for the wider population. In exploring the meaning and form of the 'minimum dwelling', they also re-defined dwelling as the hub of a new way of