From Wash Post

To get a sense of the danger hovering over Mexican democracy, consider these numbers: In the 681 years between the founding of the Aztec empire in 1325 and the present day, Mexico has lived for 196 years under an indigenous theocracy, 289 years under the absolute monarchy of Spain, 106 years under personal or party dictatorships, 68 years embroiled in civil wars or revolutions, and only 22 years in democracy.

This modest democratic 3 percent of Mexico's history is divided over three periods, far separated in time: 11 years in the second half of the 19th century, 11 months at the beginning of the 20th century, and the past 10 years. In the first two instances, the constitutional order was overturned by military coups.