The Congress of Vienna contributed to the rise of nationalist sentiment in Italy by reinforcing the fragmentation and foreign dominance of the Italian states. The decisions taken at Vienna, particularly the restoration of pre-Napoleonic rulers and the enhancement of Austrian control over northern Italy, were seen as a betrayal of the aspirations for Italian unity and independence. This external interference in Italian affairs fuelled resentment and a sense of national identity among Italians. The Congress's conservative stance and disregard for the concept of national self-determination directly challenged the growing nationalist and liberal movements, thus inadvertently strengthening the desire for unification and independence.

The revolutions of 1820–1821 and 1830–1831 had a profound impact on Italian politics and society, despite their eventual failure. These uprisings demonstrated the growing discontent with foreign rule and conservative governance, particularly Austrian dominance. They also revealed the increasing appeal of nationalist and liberal ideas among the Italian populace. Although these revolutions were suppressed, they succeeded in spreading revolutionary ideals and demonstrated the potential for collective action against oppressive regimes. The failure of these revolutions led to increased repression by conservative governments but also highlighted the need for greater unity and coordination among revolutionary forces in Italy.

Economic and social changes in Italy during the early 19th century significantly contributed to the rise of nationalist and liberal movements. The period witnessed the beginnings of industrialisation, which brought about economic disparities and social upheaval. This industrial growth, particularly in the north, led to the emergence of a more educated and economically independent middle class, who became increasingly disillusioned with the old feudal structures and foreign dominance. Additionally, the spread of Enlightenment ideas and the influence of the French Revolution inspired liberal and nationalist ideologies. These changes fostered a growing consciousness among Italians about their collective identity and the need for political and social reform.

The failure of the 1848–1849 Revolutions in Italy can be attributed to several key factors. Firstly, there was a lack of unity and coordination among the revolutionaries, who were divided by different regional interests and ideologies. Secondly, the interventions by foreign powers, particularly Austria, played a significant role in suppressing the revolutions. The Austrian military was superior in terms of resources and organisation. Additionally, the initial enthusiasm of the populace waned as the revolutions progressed, partly due to economic hardships and the fear of prolonged conflict. Finally, the conservative forces within Italy, including the Papal States and the Kingdom of the Two Sicilies, actively resisted the revolutionary movements, further contributing to their downfall.

During this period, the role of the Papacy in Italian politics evolved significantly. Initially, the Pope and the Papal States were seen as conservative forces, often aligning with Austrian interests and resisting liberal and nationalist movements. However, the increasing pressure from these movements, combined with the broader European context of rising liberalism and nationalism, led to shifts in the Papacy's stance. Under Pope Pius IX, there was a brief period where liberal reforms were introduced, raising hopes for a more progressive role of the Papacy in Italian unification. However, following the failure of the 1848–1849 revolutions and the restoration of conservative rule, the Papacy reverted to a more traditional and conservative position, often in opposition to the unification efforts. The changing stance of the Papacy reflects the complex and often contradictory role it played in the politics of the Italian states during this tumultuous period.