'Scientists were prominent in building Spain's democratic Republic - two, the chemist José Giral and the physiologist Juan Negrín, became prime ministers. Science under the Franco dictatorship was dominated by one chemist, José María Albareda while another, Manuel Lora-Tamayo, was Minister of Education and Science in the 1960s. This fascinating and totally original work examines the links between chemistry and politics in a way that casts its light far beyond the specifics of Spain.' Paul Preston, London School of Economics and Political Science