They were hindered by economic development and lack of enforcement, so I'd say 1. Cost, because no one would pay for it.
He got his powered from god
Arnold J. Toynbee (1889 – 1975) was a British and philosopher remembered for his great “Study of History” which is a big work of 12 volumes that analyze 21 civilizations; their rises and falls.
His work is a combination of philosophical and objective thoughts, so this insures the combination of facts that are analyzed from two perspectives, because he is using concrete historical events combined with his philosophical and empirical ideas. That is why many historians, philosophers, sociologists, political scientists are interested in his books and how civilizations emerged, grew, declined and dissolve themselves.
