After World War II, the countries of continental Europe faced acute housing shortages. Most postwar efforts were directed at rebuilding major industries, and house construction suffered as a result. However, once the economies were stable, attention turned to housing. In most countries of Africa, Asia, and Latin America, urban housing shortages are today particularly severe as a result of population increases, rapid urbanization, and the migration from rural areas to cities. It is estimated that in Latin America alone, four or five million families live in substandard urban dwellings. The depressed economies and social inequities of many governments have worked against development of adequate housing programs.