Each great economic transformation produces in the national economic equally great changes in its juridical and political elements. The evolution of the economic transformation can be influenced by means to intervention systems. The direction and extent of the intervention should not be determined by foreign models but must be consistent with the national reality. As for he eventual international effects of interventions, it should be remembered that both the theory and practice of free trade were the product of given historical circumstances. The international desequilibrium of 1929-32 has caused a break in the free trade mechanism and makes its re introduction extremely difficult. The interventionism which is being described seeks to free mankind from oppression. There are theoretical and practical contributions to this effect, as well as a reconsideration of the economic assumptions which justify its introduction. The faculties to guide the economy should reach the soul of capitalism, i.e. the technology. The public authorities will have to direct the selection of technical innovations and dictate the corresponding regulations, placing thus the machine at the service of man.