First English translation of the seminal study of the economic experiments put into place during the Spanish Revolution to both sustain civil society during the war and, more importantly, act as the material basis for a new society. These plans weren't developed by professional economists but grew out of a political movement that put working people at the the fore and believed that the collectivised workplace would be the cornerstone of economic life. Chris Ealham, author of Anarchism and the City provides a preface that helps explain this seminal work.