Here ; they aren't London and Paris ; they are " Mecca" and "Yathreb".... these two competitors had very interesting stories to tell ; from these angles ; culture , arts , science , trades , economy , military power , brain power , morals , ethics , social behavior ..etc..etc..., people that are high in brain power , quality wise city structure , lesser in numbers compared to the nomads around them but joined together they formed a pyramid ; few but qualified leaders from these cities at the top of the pyramid, the cities that took the Arabs to the top in earlier time . Unfortunately ; such " pyramid " structure had been destroyed , replacing qualified leaders from the cities by selective others from nomads ; a main reason for these two cities not actually becoming like London and Paris or even better...!...