His reputation has experienced a bit of a rehabilitation, and he has been called one of the first politicians and diplomats in the modern senses of the terms. Clearly, his diplomatic role was important: the Sicilian uprising began the War of the Sicilian Vespers, the "world war" of the 13th century, a key event in the subsequent history of Europe.
His reputation has been rehabilitated, and he is considered a pioneer in modern politics and diplomacy. His role as a diplomat was significant: the Sicilian uprising initiated the War of the Sicilian Vespers, a key event in 13th-century European history.