Mexico's economy expanded substantially after World War II. As it expanded, the country became prosperous and the population more middle class. More and more factories were built, bolstering the economy, but resulting in lower pay for workers ‒ the people who kept the economy afloat. Mexican politics and economy went hand in hand when "political stability Ávila Camacho encouraged enough foreign capital back into the country to bolster high rates of growth". Mexico's "emphasis on economic development...has focused on those activities, industry and commerce, that are most efficiently undertaken in urban areas, where there is an adequate supply of labor, credit, transportation, and communication". This emphasis on urbanization eventually led to the worker and student movement of the 1960s.