Abstract
In the origins of the Mexican State as an independent constitutional state it cannot be ignored that one of its juridical-political pillars was the Plan of Iguala signed by Iturbide on February 24, 1821 understood, in the language of its time, precisely as a fundamental law which until now has not been recognized for ideological reasons. The concept of Basic Law is reviewed and concluded by qualifying this political project as one of the four fundamental laws at the origin of the independent Mexican State.
Keywords México; Plan de Iguala; Agustín de Iturbide; Fundamental Law; Constitution