"Passions and Tempers may excite passions and tempers in some of its readers, as a good work of intellectual history should. You will learn a lot from its pages." --Washington Post The humours--blood, phlegm, black bile, and choler--were substances thought to circulate within the body and determine a person's health, mood, and character. The theory of humours remained an inexact but powerful tool for centuries, surviving scientific changes and offering...