The economic thought left behind by the leaders is a new and timely thought that suits the place and time in which it appeared. It - whatever its type or appearance - must be considered the basis of the political and material power of states and peoples. These countries, which today boast of power, greatness and influence, have built this power on the foundations of economic thought and economic thinkers such as Adam Smith, Malthus, Marshall, Keynes...etc. They are the driving force behind constructive economic relations that increase national income. Hence, they understand the direct reason for the material progress achieved by these peoples.