"When Did Dominance End in Mexico?" — Clarification Needed

The question "When did the dominance end in Mexico?" is too vague to answer precisely. "Dominance" could refer to many historical, political, or economic phenomena:

Possible Interpretations

• PRI hegemony: Institutional Revolutionary Party ruled 1929–2000 (lost presidency); 2012–2018 return; 2018 lost again
• Spanish colonial rule: Ended 1821 (independence)
• Porfiriato (Díaz dictatorship): Ended 1911 (Mexican Revolution)
• US economic dominance: Ongoing; NAFTA/USMCA integration
• Drug cartel territorial control: Shifting; no single "end"
• Aztec Empire: Ended 1521 (Spanish conquest)
• French intervention (Maximilian): Ended 1867
• Catholic Church political power: Curtailed 1850s (Reform Laws), 1917 Constitution, 1992 reforms
• Hacienda system: Broken by Revolution (1910–1920), land reform 1917–1992
• One-party state: 2000 election (Fox/PAN victory)

To Get a Precise Answer

Please specify: Whose dominance? Over what domain? In what period?

• Political party? Foreign power? Economic sector? Social group?
• National or regional?
• Formal end (law, election) or de facto decline?

Most Common Academic Reference

If referring to PRI's single-party dominance: July 2, 2000 (Vicente Fox/PAN wins presidency). But PRI returned 2012–2018.