President Truman belleved that an increase in a na development, which typically includes the exploitation of tion\'s ii means that a nation is moving toward economic . levels of consumption; immigrant laborers O levels of consumption; natural resources O standard of living; immigrant laborers Ostandard of living; natural resources Solution President Truman believed that an increase in nation\'s levels of consumption means that a nation is moving towards economic development, which typically includes the exploitation of natural resources..