The work, also, evaluates the differences between Northern-Central Italy and Southern Italy. Around 1000 A.D. Northern Italy and Central Italy had a more active civil society, with many citizens taking part in politics and social gatherings in their communities. Northern-Central Italians had a mutual trust for their fellow citizen, governing horizontally. Politics was less hierarchical in their region. Southern Italy, however, was very different from its Northern-Central counterpart; a group of Norman Mercenaries created order in the area. The governing structure was much more vertical: the peasants were controlled by the knights and the knights were controlled by the kings. Northern and Central Italy created a democratic-type system for their citizens. Conversely, Southern Italy created a feudal and autocratic system of governing. Putnam concludes that these long-standing differences still help to explain north–south differences in governance, many centuries later.