I would say that the most likely reason is <span>a high birth rate. There's usually a higher birth rate in less developed countries. The higher the birth rate, the more young children, the smaller number of </span><span>an ageing population. </span>
Emperor Honorius moved<span> the </span>capital<span> of the </span>Western<span> empire to this northern Italian city.</span>
When you arrive in Iowa, it is likely to be very hot. <span>If you are unaccustomed to really hot, humid weather, be sure to drink plenty of water during exercise or outdoor activities. The combination of heat and humidity can make an 85-degree day seem well over 100 degrees.</span>
The rise of the public sphere and public opinion.
The growth of a print culture and literary market - newspapers etc, the multiplier effect.
The rise of coffee houses, clubs, social gatherings. The voice of the street
The breakdown of absolutist politics.