Book excerpt: This pioneering collection of original essays explores the rich analytical category of psycho- active substances from challenging historical and anthropological perspectives. Psychoactive substances have been central to the formation of civilizations and the growth of the world economy. Consuming Habits describes how and why: tea and coffee replaced beer on the breakfast tables of 18th century Europe in Islamic emirates at the turn of the century kola nuts formed part of tax payments, and were given as gifts by so-called `big men' In 1902 opera singers had their doctors prescribe them cocaine to aid singing the original version of `coca-cola' was described as a `brain tonic.' This pioneering collection of original essays explores the rich analytical category of psychoactive substances from challenging historical and anthropological perspectives.