Resumen: In modern theory of the national economy, it has become customary to think about all economic phenomena exclusively in terms of a capitalist economy. All the principles of our theory—rent, capital, price, and other categories—have been formed in the framework of an economy based on wage labor and seeking to maximize profits (i.e., the maximum amount of the part of gross income remaining after deducting material costs of production and wages). All other (noncapitalist) types of economic life are regarded as insignificant or dying out; they are, at any rate, considered to have no influence on the basic issues of the modern economy and, therefore, are of no theoretical interest.