Economically unstable (see below)
Weakness of the political system
Lack of Italian identity
apathy or opposition to unification
no nationalism - loyalty to family or immediate locality
the clear economic and cultural divide in Italy lead to mass unrest within the South and large disparities economically. This meant the country became v hard to govern as one, and the South became a large problem for the Liberals.
Such as anarchists, Socialists, Radicals, Republicans and Catholic Church. - all opposed Liberal government/policies
Church was extremely powerful - large practicing population - had lots of political influence. Was opposed to Liberals and unification.