One of the founding fathers of organic chemistry and also a great teacher, Liebig (1803-73) enjoyed a close relationship with Britain, whose scientific education, medical practice and agriculture he transformed. Brock’s fresh interpretation of Liebig’s stormy career shows how he moved chemistry into the socio-political marketplace, demonstrating chemistry’s significance for society in food production, nutrition and public health. Through popular lectures and his readable Chemical Letters, Liebig also commented on issues such as scientific methodology and materialism. This is the first English-language biography of Liebig since 1901.