Three years ago the National Autonomous University of Mexico through the Dr. Gustavo Baz Prada Chair awarded me a grant to undertake research on migrants in the municipality of Xilitla, a magical town in the Huasteca zone of San Luis Potosi, Mexico. At that time, I had conducted a review of the state of knowledge of migration in Central America, Mexico and the United States. The literature broadly mentioned that the migration phenomenon involved the...