He thought a united front would be more effective in the battle against the entrenched Catholic Church.
<span>c European armies were able to conquer much of the world. </span><span />
c the city had developed a social and political hierachy
The second answer: the unemployment rate soared to 25% at its peak
Warfare between city-states, overpopulation, and drought. The factors were not always contemporary or found all together in a single city.
Hope this helps