How did the mexican revolution destroy the democratic system in mexico

The Mexican Revolution was meant to end the dictatorship of Porfirio Diaz, and to establish a democratic government for Mexico. Even though democratic elections have been held since the event occured, the democratic system lacks the ideal amount of efficiency. It wasn't necessarily a destruction of the democratic system, however, the opportunity to make the change was definitely there and it was pursued in a poor fashion.

Is there a passage that comes with this question or should i know this right off the bat, because if it is, i probably have short term memory loss or college is too stressful

He droped it over the bridge into the river