This is the first of two chapters to look at the inhabitants of each city, the actors of its history. Roman society is studied through the elites (including the popes as rulers of the city) and the populus. The study of the Roman aristocracy in the periods 750–900, then 900–1000, looks at individual members and their families, titles, status, and wealth; and at the popes themselves, individually and collectively, through their struggles in elections, riots, and conflicts. The populus (urban clergy, merchants, artisans, pilgrims, the poor) is next. The period saw power alternate between a secular aristocracy, first as members of the papal government in the ninth century, then as a separate entity in the tenth century. But the papacy’s role had become too important on the European scene, through the veneration for St Peter, for the city to be governed independently of its involvement in international affairs