Why did it take Italy longer to unify than other European nations such as Great Britain and France?

Because france did no want Prussia to unite the Germans and, as a result, there was The Franco Prussian War and France was defeated. As a result of this war, the German Empire was proclaimed. This had nothing to do with a German inferiority complex and yes, it did take much longer than the UK, France and Spain.

yes based on alexanders actions he deserved the title of "the great". his empire covered about 3,000 miles and he was able to establish the empire over a 13 year period of time. he was able to conquer many different places. he also defeated the persians. he conquered egypt and developed a city and named it after himself.