ABSTRACT
The humanly trade should be explained, or that, which one cannot be explained should be proven as a constant datum of our problems, in order to secure our actual field from disturbances, coming from this side. However, a real theory of the humanly trade will never be reached this way. Philosophies about the motivations, examinations of it, and conclusions of the diversity of human nature, according to place and time, and the teaching of necessity of the psychological national economists, these are three points, which people have their eye on. The interaction between the margin of nourishments and the population number is not economical at all, or rather not purely economical. It surely partially belongs into the field of biology. What is fostered to be said about it lets itself be characterized through the words: discussion of the term, assumption of the capital, as an individual production factor, and finally, discussion of capital growth.
