While the great series of constitutional theory, We the People, written by Professor Bruce A. Ackerman, vividly describes what We the People in the U. S. has achieved in the constitutional canon without the form of the amendment, his historiography does not succeed in justifying why the existing We the People has to obey such an illegitimate Constitution. This article, firstly, clarifies his theory's failure with both the methodology of ‘history of law' and ‘history and law.' The evidence shows his methodology of ‘historicism' cannot define what the constitutional canon should be or should have been although it can define what the constitutional canon is or was. Secondly, comparing Ackerman's recent fundamental idea, ‘living Constitution,' ...