ABSTRACT
After a century of experience, we are now thoroughly accustomed to viewing the fourteenth amendment as imposing upon the experimentation otherwise permitted in our fifty separate "laboratories" limitations that do not materially differ from those fastened upon the national government by the bill of rights. 1 The history of this evolution is far too well known to justify rehearsing here even in the barest outline. 2 But it bears noting that few, if any, observers believe that the language of the amendment has played a significant role in this historical evolution. Here, as elsewhere, "[b]ehind the words . . . are postulates which limit and control." 3
