Zapata began to make new revolts, which in turn scared the U.S. and they in turn ordered the execution of Madero. In 1916, with the backing of the U.S., Venustiano Carranza took control. A new constitution was formed in 1917, which gave Mexico the right to own all minerals; this reduced foreign investors and benefited the mestizo and Indian peasants. .

             In 1920, revolutionaries pressed for new leadership; under the presidency of Alvaro Obregon, the long period of disorder drew to a close, and the results of revolution took clearer shape (Stearns p.616). The caudillismos, a name for Latin American leaders, were put down and a single political party to control. The PNR (National Revolutionary Party) could sway the elections of Presidents, but it would only allow the President to rule for six years and putting to an end to any kind of dictatorship. In the 1990's the PNR was renamed the PNI and they let freer elections take place. This political stability has let Mexico become more independent of outside relations and let Mexico prosper in the 20th century.

             Just as the United States was facing a depression in the 30's, Latin America was feeling the effects of other countries not being able to buy their agricultural goods. Not being able to sell goods and make money poverty was growing and rioting began. People began to see they needed to create a better economy and gain economic independence. One great Mexican president was Lazaro Cardenas. Cardenas set up land reforms, spread education and organized a state bank. With these reforms came prosperity for Latin America from 1940 to 1960. After Cardenas presidency followed weak political leadership which brought Getulio Vargas to power in Brazil from 1930 to 1945. Under Vargas rule, Brazil set up steel mills, produced much of its own goods, and the Amazon basin was opened to agricultural developments. Modern office buildings and apartments sprung up in Brazilin cities and though Brazil remained agricultural, it saw economic growth.