With a wider territory and an increasing commerce, it was natural for Florence to assume more and more the attitude of a sovereign state, ready, when need was, to impose its will upon its neighbours, or to join with them for the common defence of Tuscany. In the noble class and its retainers, recruited as has been described, it was possessed of a standing army which, whether from love of adventure or greed of plunder, was never so well pleased as when in active employment. Not that the commons left the fighting wholly to the men of family, for they too, at the summons of the war-bell, had to arm for the field; but at the best they did it from a sense of duty, and, without the aid of professional men-at-arms, they must have failed more frequently in their enterprises, or at any rate have had to endure a greatly prolonged absence from their counters and workshops. And yet, esteem this advantage as highly as we will, Florence surely lost more than it gained by compelling the crowd of idle gentlemen to come within its walls. In the course of time some of them indeed condescended to engage in trade--sank, as the phrase went, into the ranks of the _Popolani_, or mere wealthy citizens; but the great body of them, while their landed property was being largely increased in value in consequence of the general prosperity, held themselves haughtily aloof from honest industry in every form. Each family, or rather each clan of them, lived apart in its own group of houses, from among which towers shot aloft for scores of yards into the air, dominating the humbler dwellings of the common burghers. These, whenever they came to the front for a time in the government, were used to decree that all private towers were to be lopped down to within a certain distance from the ground.