What political,economic,and social structures made Italian unification difficult?

A strong answer would include
-the fact that the Italian peninsula was politically disunited and divided by different regions whose people were not in agreement as to a common future.
-the fact Italy was also disunited economically,as northern Italy was much more prosperous than southern Italy.
-an acknowledgment of the presence of the Habsburg monarchy in the northern half of Italy.Austria was a powerful country that could not be easily intimidated or defeated.
-an acknowledgment of the pope's influence and temporal control over the Papal States around Rome.
-an explanation that various provincial elites had local power and were not eager to share it with others or to change their ways.