As part of this economic-liberalization agenda, the U.S. has also supported policies to ensure stability in this country with which it shares a 2,000-mile border. Widespread instability would not only threaten U.S. economic interests in Mexico but would also put the U.S. free trade agenda at risk throughout the hemisphere. In addition, Washington policymakers fear that economic and political instability in Mexico would aggravate immigration and drug flows into the U.S.
Under these conditions, one can understand, to a certain degree, the political instability in Mexico during its first four decades of independence. Between 1821 and 1847, four types of government were tried: a monarchy in 1822, a federal republic in 1824, and two forms of a centralized republic, one of which was in 1836 and the other in 1843. One should add to this sad picture that Mexico faced a hostile international environment. When one analyzes Mexico's problematic development in all its dimensions between 1821 and 1867, one can conclude that only the existence of a profound link, beyond that of economics or politics, can explain the survival of the country. For that reason, one can affirm that in Mexico, in contrast with the United States, that yes, a nation existed, but its condition was precarious.
That's one result of genuine political competition, ..
The Mexican Revolution , caused at least partially by the increasing animosity towards foreign ownership of Mexican properties, began in 1910. The Revolution increased the political instability in Mexico, but actually did not significantly slow United States investment. It did reduce economic development within Mexico however, and the border regions reflected this. As the infrastructure of communities on the United States side of the boundary continued to improve, its Mexican counterparts began to fall behind in the construction of important transportation networks and systems necessary to municipal development as well as the upkeep of systems already in place.