When was oil discovered in Mexico?
if we could get Juarez to keep power we could have some things go right (I don't know what.
I know almost nothing of Mexican history, except that Cinco de Mayo means 5th of May and has something to do with Juarez gaining power, not with the sinking of a boat called the May

). Standard Oil could then pour a lot of investment dollars into Mexico to help stabilize it and at least create a workable middle class of oil workers and others, who can then pump more money into the Mexican economy.
Or did that happen and it failed, anyway? I don't know. All I know is, I feel sorry for Mexico. they're kind of like the Detroit Lions of history. With a bunch of Matt Millens in succession leading them.
Edit: Okay, I was typing while Matthias posted. Some good ideas; perhaps Standard Oil helps to finance the development of those telegraphs and railroads? After all, the money's got to come from somewhere.
While it's true that this would be, in large part, the Untied States helping to do it at first, this is at least helpful till they can get their own industry going. And, when the trust busting starts, it would be easy for the Mexican parts to then splinter off and become sucessful on their own. Perhaps with some compromise bones thrown tot he liberals in the form of their own laws to regulate the monopolies of the Mexican versions of Standard Oil, a few railroads, etc. From the Wikipedia article, it seems one of the largest problems, at first, was the 1917 Constitution's declaring all oil production was owned by the government, which hurt foreign investment. Perhaps if the exploratory oil driling hits something in the 1870s?