Let us turn now from the petty and dubious manifestations of a corrupt spirit to those larger and more directly threatening practices which have become subject to public criticism and in some cases to repressive legislation. The field thus ventured upon is so extensive and its features are so involved that no progress can be made in its discussion without classification. Yet any scheme of classification that may be attempted must encounter great difficulties. Individual judgments vary widely regarding the importance or degree of danger to the public interest of various anti-social developments. Along certain lines corrupt practices have been exploited by journalistic enterprise with great pertinacity, while other suspicious areas are still largely neglected. As a consequence of the very difficulties which embarrass it, however, there is a certain justification even for a confessedly imperfect classification. A service of considerable importance may be rendered merely by bringing together in the form of an outline all or nearly all the more threatening forms of corruption in such a way that some of their salient characteristics and interrelations are more clearly developed. Without therefore claiming finality for the following arrangement it would seem desirable to distinguish roughly two great fields of corrupt practices: first, corruption in professional life generally; and second, corruption in business and politics. The divisions and subdivisions of these two groups will be indicated later. Corruption in professional life will be discussed with some detail in the present study.[40] Business and political corruption, the interrelations of which are very numerous and close, will form the subject of the following paper.