France is a good example of a complex society due to the history being well known and documented. Thus, historians can trace just how the rise of medieval France occurred. The evolution of ancient Gaul into early modern France provides an example to how complex societies have come into being. There existed a degree of continuity in the hierarchical organization of France from the Iron Age to the 18th century. When the Romans attempted to organize Gaul, they altered the tribal structures which were not simple rather complex chiefdoms.