Final answer:
Porfirio Diaz's regime initiated the Mexican Revolution through his corrupt and authoritarian rule, leading to social unrest and the rise of challengers like Francisco Madero.
Explanation:
Porfirio Diaz's corrupt, authoritarian regime marked the start of the Mexican Revolution. Diaz had ruled Mexico for 35 years, fostering unrest among peasants, workers, and the urban middle class. Francisco Madero, a liberal reformer, challenged Diaz, leading to resignation in 1911 and subsequent upheaval.
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