In 1874 Richard L. Dugdale was employed by the New York Prison Commission to visit the prisons of the state. In this visit he was surprised to find criminals in six different prisons whose relatives were mostly criminals or paupers, and the more surprised to discover that these six criminals, under four different names, were all descended from the same family. This led Mr. Dugdale to study their relatives, living and dead. He gave himself up to this work with great zeal, studying the court and prison records, reports of town poorhouses, and the testimony of old neighbors and employers. He learned the details of 540 descendants of Max in five generations. He learned the exact facts about 169 who married into the family. It is customary to count as of a family the men who marry into it. He traced in part others, which carried the number up to 1,200 persons of the family of the Jukes. The Jukes rarely married foreign-born men or women, so that it may be styled a distinctively American family. The almost universal traits of the family were idleness, ignorance, and vulgarity. They would not work, they could not be made to study, and they loved vulgarity. These characteristics led to disease and disgrace, to pauperism and crime. They were a disgustingly diseased family as a whole. There were many imbeciles and many insane. Those of "the Jukes" who tended to pauperism were rarely criminal, and those who were criminal were rarely paupers. The sick, the weak, and goody-goody ones were almost all paupers; the healthy, strong ones were criminals. It is a well-known fact in sociology that criminals are of three classes: First, those who direct crime, the capitalists in crime, who are rarely arrested, who seldom commit any crime, but inspire men to crime in various ways. These are intelligent and have to be educated to some extent. They profit by crime and take slight risks. Second, those who commit heroic crimes and find some satisfaction in the skill and daring required. Safe-breaking, train robbery, and some types of burglary require men of ability and pluck, and those who do these things have a species of pride in it. Third, those who commit weak and imbecile crimes, which mark the doer as a sneak and a coward. These men rob hen roosts, waylay helpless women and old men, steal clothing in hallways, and burn buildings. They are always cowardly about everything they do, and never have the pluck to steal chickens even until they are half drunk. They often commit murder, but only when they are detected in some sneaking crime and shoot because they are too cowardly to face their discoverer.