Tribology is the science of interfacing surfaces in relative motion. These interactions control the function of almost every device made by man, and the science of tribology is therefore a key element in a multitude of engineering applications. This text covers all the major periods in the history of science and technology, including the much-neglected Middle Ages, the Renaissance ad other recognised eras of scientific development. For each period the author puts triboloogy in its social, environmental and historical context, to show that the science and technology of tribology developed from the need to solve practical solutions of the day. This edition contains new material dealing with recent developments in the area.