Sicily of 2017, 750,000 Sicilians, 14.4% of the island's population, lived abroad. For lack of employment, every year many Sicilians, especially young graduates, still leave the island to seek jobs in richer Italian regions or in foreign lands. The politics of Sicily takes place in a framework of a presidential representative democracy, whereby the President of Regional Government is the head of government, and of a pluriform multi-party system. Executive power is exercised by the Regional Government. Legislative power is vested in both the government and the Sicilian Regional Assembly. The capital of Sicily is Palermo. Traditionally, Sicily gives centre-right results
Emirate of Sicily had been unified by Ayyub ibn Tamim, the son of the Zirid emir of Ifriqiyya. In 1068 he left Sicily, and what remained under Muslim control fell under two qadits: one, led by Ibn Abbad (known as Benavert in western chronicles) in Syracuse, and the other under Hammud in Qas'r Ianni (modern Enna). By the 11th century mainland southern Italian powers were hiring Norman mercenaries, who were Christian descendants of the Vikings; it was the Normans under Roger I who captured Sicily from the Muslims. The Norman Robert Guiscard, son of Tancred, conquered Sicily in 1060 after taking Apulia and