A work of seminal importance, this book presents Ivan Illich's penetrating analysis of the industrial mode of production which characterises our contemporary world. The conviviality for which noted social philosopher Ivan Illich is arguing is one in which the individual's personal energies are under direct personal control and in which the use of tools is responsibly limited. This book claims out attention for the urgency of its appeal, the stunning clarity of its logic and the overwhelmingly human note that it sounds.