The criminologist Erich Wulffen, who made a name for himself primarily through the publication of numerous criminal manuals, examines the characters of the Moor brothers in this volume in terms of their amorality and their reality content. Schiller's play takes advantage of the dramatic method to catch the soul in its most secret operations. Wulffen elaborates in detail on both the medically and criminally relevant aspects of the characters. This is a carefully edited reprint of the original edition from 1907.