Economic considerations all but dominate recent historical writing in this country about the railroads of Mexico. Technical matters of construction and operation, as well as the role of the state in both, are touched upon, but economic interpretation, whether of the development of a railway system or of its impact on the nation, is the watchword if not catchword of most writing. Probably the leading example of the dominant approach is Growth against Development: The Economic Impact of Railroads in Porfirian Mexico (Northern Illinois University Press, 1981), by John H. Coatsworth, in which the author concludes that, while “the short run contribution of railroads to economic growth was large,” their longrun impact helped “to create the underdeveloped country Mexico has become.” Applying economic theory and measuring, Coatsworth in essence proves with numbers a case argued more elegantly in straight prose early in this century: that the application of a modern transportation network to a staple producing economy will do little more than extend and intensify the production system so as to increase the staple output.