Migrant labor is an issue receiving an increasing amount of attention. It has become a matter of growing importance as a number of factors, including rapid population expansion and higher rates of urbanization, lead many people to seek better economic opportunities in other countries.

The International Labour Organization estimates there are roughly 96 million migrant workers and their dependents in the world today. Some experts predict that the number will double in the next twenty years.

In the United States there are 6.3-million illegal workers in the United States, according to estimates by the Pew Hispanic Center. About half of those are from Mexico. These illegal Mexican immigrants are at the center of an ongoing debate as to how the United States should handle illegal immigration.

A common belief is that Mexicans immigrate to the United States in order to find work. But according to a study conducted by the center, a lack of jobs in Mexico is not a major reason that immigrants come to the United States illegally. Rather, immigrants are driven out of their home country because of Mexico