We consider it our imperial duty to impress upon the Reichstag the necessity of furthering the welfare of the working people.... In order to realize these views, a bill for the insurance of workmen against industrial accidents will first of all be laid before you; after which a supplementary measure will be submitted, providing for a general organization of industrial sick-relief insurance. Likewise, those who are disabled in consequence _of_ old age, or invalidity, possess a well-founded claim to more relief on the part of the state than they have hitherto enjoyed. The program here outlined was carried out by the enactment between 1883 and 1889 of a series of laws, which taken together constituted a pretty effective system of social insurance for the mass of wage-workers in the German Empire. Later amendments have extended and improved the various features of the plan, which has served as a stimulative example to other countries. America has been the tardiest among all the industrial nations to undertake this kind of social reform. § 4. #Features of social insurance.# The plans of social insurance, in force in various countries, present a great variety of features combined in many ways. The main characteristics in which they may differ relate to (1) the element of compulsion, (2) contributions by the insured, (3) the nature of the insurance organization. Insurance may be _voluntary_ or _compulsory_. It is voluntary when the state simply encourages the formation of insurance agencies, and perhaps contributes something to them, leaving it to the individuals to insure themselves as they choose, in mutual societies, or in privately managed companies. In the case of accident insurance, however, there is often a semi-compulsion by which the employer is requires to pay indemnity to his workers, according to fixed scales of compensation, but is left free to insure himself against this risk or not as he pleases, in which case it is still called voluntary insurance. Compulsory insurance is that which the state requires to be provided be means of some mutual organization of the insured, or of the employers, or by the state. Insurance may be _contributory_ or _noncontributory_. It is on the contributory plan when the insured workers contribute something toward the premiums that provide the funds for eventual payment. It is noncontributory when the funds are provided either by the employers or by the state without any payments from the insured. Insurance may be (a) in _private_ companies, carrying on the business for profit; or (b) in _mutual_ companies of workingmen, or of employers insuring themselves against the cost of compensation in case of accident to their employees; or (c) in a _state_ bureau, or fund, organized and conducted by government.