IOTL Italy was a collection of fragmented states under Habsburg and Bourbon influence after the Congress of Vienna, and after the events of 1848 the dream of a united Italy came to fruition.
The House of Savoy, which ruled the island of Sardinia and the northwestern Italian region of Piedmont, managed to harness the nationalistic energies of the time to unite Italy into a kingdom under their rule, using the Savoy's opportunism combined with Cavour's political savvy and Garibaldi's determination to do so. The other major players in Italy were left behind, so to speak; the Bourbons of the Two Sicilies were seen as too reactionary and weren't as keen on unification; likewise Pope Pius IX didn't find it in his best interests to do so.
So assuming for some reason the Kingdom of Sardinia doesn't unify Italy. Who does then?
The House of Savoy, which ruled the island of Sardinia and the northwestern Italian region of Piedmont, managed to harness the nationalistic energies of the time to unite Italy into a kingdom under their rule, using the Savoy's opportunism combined with Cavour's political savvy and Garibaldi's determination to do so. The other major players in Italy were left behind, so to speak; the Bourbons of the Two Sicilies were seen as too reactionary and weren't as keen on unification; likewise Pope Pius IX didn't find it in his best interests to do so.
So assuming for some reason the Kingdom of Sardinia doesn't unify Italy. Who does then?