Final answer:
Nationalism influenced Italian unification by fostering a sense of shared Italian identity and inspiring movements for independence and self-governance.
Step-by-step explanation:
Nationalism played a significant role in the unification of Italy in the 19th century. Italy was comprised of various states under the control of the Austrian Empire and the Catholic Church. The desire for freedom and relief from authoritarian rule, along with a growing sense of common goals and aspirations, led to uprisings and rebellions against traditional monarchies and foreign powers. Nationalist leaders like Giuseppe Mazzini and organizations like Young Italy promoted a sense of shared Italian identity and fostered movements for independence and self-governance. These movements ultimately led to the unification of Italy.