Economists advised the people of Third World countries to save more and to invest it as capital, a strategy based on the writings of such classical economists as Adam Smith, John Stuart Mill, and Karl Marx. The key question, therefore, was where and how to invest. Some experts recommended balanced growth, while others argued for unbalanced growth, that is, investing heavily in one area, and letting other areas be pulled along, Investment was usually concentrated in the industrial sector, often at expenses of rural and agricultural