كتاب رائد علم الاقتصاد .. ابن خلدون

"Ibn Khaldun is the first world thinker to see the importance of economics for politics." The state and the Sultan are the greatest market in the world ... if the Sultan is withheld, They are the majority of buyers and the markets have been abandoned ... The profits of the products are also falling and the profits of the products are reduced, because the levies are lower because the levies and taxes come from agriculture, trade, good trade and commercial transactions. , And the demand of people for benefits and profits, and this is a return on the state of the lack of the shortfall of the revenues resulting from the reduction of the wealth of the ruler or the state .. "