In 1908 Porfirio Diaz said in an interview with an American Newspaper that Mexico was finally ready for democracy and he would step aside and the next election. OTL he didn't keep that promise, which than sparked the Mexican Revolution.
What if he doesn't make this promise, or says that Mexico isn't ready for democracy?
IOTL he died in 1915. Without the stress of a civil war he might live an extra year or two, assuming butterflies don't spark a different civil war. What happens after his death? Is there a smooth transition into another dictator or possibly into democracy or do we see violence either between the people and the government, or between different factions within the government, or possibly both?