World revolution is not confined to the Old World of Africa--Asia--Europe. It is widely prevalent in the Americas where it can claim a certain priority. Outstanding among colonial uprisings of modern times was the rebellion of the British colonies of North America, from 1776 to 1783. Even more widespread was the rebellion of the Spanish, Portuguese and French colonies of Central and South America which spanned most of the nineteenth century and extended on into the twentieth. Russian Bolsheviks held the headlines on revolutionary activity from 1917 to 1943 but it should not be forgotten that one of the most prolonged and thorough-going revolutions of the present century gripped Mexico from 1910 to 1917. At the beginning of this period Mexico was a political semi-dependency of the United States. It was semi-feudal, with a large population of Amerindians and a pre-industrial economy. Foreign capitalists and entrepreneurs, including those from the United States, played a leading role in the country. Mexico's 1910-1917 revolution was prolonged. It was also radical, up-rooting many aspects of its old social pattern, speeding up the bourgeois revolution, and preparing the way for a Mexican form of populism and a Mexican foretaste of a proletarian revolution, initiated, led and manned by Mexicans. Mexico's revolution resulted in two important developments that have played a major role in socialist construction. Both contributions appeared in the Mexican Constitution of 1917, adopted eight months before the Russian Bolsheviks seized power in November. The first contribution was a chapter on the rights of labor. Bourgeois constitutions had emphasized "civil" rights: the right to vote, trial by jury; freedom of speech, press, assembly; the right to go and come; the right to compensation when private property is taken for public purposes; the right to modify or replace the existing constitution. The Mexican Constitution of 1917 contained a detailed specification of the rights of labor, including proper working conditions, adequate compensation, education, health, social security. The Constitution also contained a crucial property provision: the natural resources of Mexico are the property of the Mexican people and cannot be alienated. This second provision was inserted in the Mexican Constitution at a time when extensive concessions to develop Mexican resources had been handed out to North American and European capitalists. It was inserted in part because the social ownership and sharing of land and other natural resources has been one of the basic demands of the Socialist--Communist--Anarchist movements from their inception.