The impersonal and the personal views of distribution are not, however, contradictory; they are different aspects of the same question. It cannot be said that the analysis of economic rent is a purely abstract piece of work. In fact, the impersonal view of distribution is essential to an understanding of the personal view of it. The one gives general principles, the other the special cases. In the practical economic issues of the day, the most urgent need is a better popular understanding of the abstracter theory of value. It is a guiding thread through otherwise bewildering mazes. [Sidenote: Composition of personal incomes] The actual incomes of individuals are made up of different elements. The wage-earner and the salaried man are rarely quite without material wealth. The enterpriser gets some income also in the form of contract interest, or as rent from machinery. Actual personal incomes are therefore a sum of various functional or impersonal incomes. The earnings of every agent may be thought of as always going either to some individual or to some group. By social convention the receiver of incomes that are not personal gifts is supposed to have produced them. This involves the great assumption that the owner of a piece of land has produced or contributed in some way to society an amount equal to the rent. This may be true in many cases, but in many cases this view cannot be accepted without close scrutiny. [Sidenote: Law in relation to wealth] 3. _Property and wealth are respectively the personal and the impersonal, the legal and the economic, aspects of productive agents._ Law holds an important place in the discussion of actual economic questions. This fact was not overlooked by John Stuart Mill, and it has been far more clearly recognized in the last few years, especially by the German economists. Political law in the broadest sense, as embodied in the state, is, in the first place, a set of rules to guide the conduct and regulate the relations of men in society--a legal code; it is, in the next place, a governmental machine to determine disputes between men--a judicial system; and it is, finally, physical power to bring contestants into court and to secure and protect their rights--a police force. Whether acting through legislature, courts, or police, in all its dealings with wealth the law is predominantly personal. The question the law asks and answers regarding wealth is not _What_, but _Who?_ Who is the owner, who should control, receive, enjoy the income? Economic wealth consists of scarce things, of valuable agents, and because they are scarce, men quarrel over them. Because of the impersonal economic fact that a field and a machine produce scarce goods, arises the legal question as to which man is entitled to enjoy them. [Sidenote: Property and wealth]