Without in any way questioning the validity of the rule of construction stated in the preceding paragraphs, it is to be observed that its propriety is absolutely dependent upon the prior assumption that the Federal Government exists as the agent of the people, and not, according to the States' Eights theory, as the agent of the States. Had the theory which conceives the United States to be a confederacy of sovereign States, and its government as the agent of these creating component units, been accepted, it would have logically followed that a doctrine of strict construction of federal powers would have been appropriate, for then these powers would have been in direct derogation of the rights reserved by the States that granted them. Strict construction thus is a logical corollary of the States' Rights theory.