Don Guillén was clearly convinced that there was enough discontent in New Spain to bring about a rebellion and then complete political independence and considered Indians, Creole elites, and enslaved blacks supporters for such an idea. "Don Guillén’s plan crossed ethnic divides to seek a new social contract among all inhabitants of New Spain." However, unlike the increasing absolutist policies of the Spanish crown, Don Guillén envisioned his monarchy as being limited and based on the people's concession of sovereignty to him, a contractual relationship between monarch and those he ruled. He diverged from sixteenth-century Spanish thought on the popular concession of sovereignty to the monarch being irrevocable once conceded, and asserted that the people retained the right of rebellion if the monarch became a tyrant. Don Guillén may have read a sixteenth-century treatise that defended tyrannicide. In Don Guillén's view, the Spanish control of its overseas empire was unjustified, following the century-old arguments of Bartolomé de Las Casas. Inquisition officials read this argument in Don Guillén's seized papers and restated in the trial record the official position on the justification of Spanish sovereignty.