We have made our peace with economics by considering first the effect of occupation and residence in giving to the citizens of each city-state solidarity of interest and attitude. We have dwelt a little on the force which beliefs as to their origin and their destiny hereafter exerted in keeping the city-states apart. We have still to notice the centrifugal influence on the Greek race of their urban institutions and politics. Each city in Greece had its own laws and customs. These were not, as with us, cold abstractions, but real, ever active, almost living, personal forces, moulding incessantly their subjects according to a given model. The citizens of each city had, in fact, a general family resemblance, due to the imprint set upon them by their social and political institutions. Cities acquired by this means clear-cut individualities which were capable of definition, not simply by narrating their history, but also in terms of physical, intellectual, and emotional qualities. We may illustrate this point by observing that the Hellenes created one literary type which we have not borrowed from them: they wrote the biographies of cities as well as of men. Their philosophers studied the effects upon urban character of climate, prevailing winds and pursuits, location with reference to the sun and the sea, contact with foreigners, and other similar agencies. They even had specifics which they prescribed for the physiological and pathological ills of cities, just as our sciolists, on a much more slender basis of facts, however, diagnose the diseases and classify the good and evil qualities of nations.