"In the history of mankind, epidemics of madness present a particularly curious page. In addition to many other kinds of contagions, epidemics of madness frequently appeared upon various continents. Whole countries suffered from the intrusion of malicious ideas into various domains of life. Naturally, these epidemics broke out especially frequently in the spheres of religion, superstition, and within the bounds of official suspiciousness. Ch. 19 Epidemics"