The term , which also designates Choosing the cultural , political and social movement that promoted Cause_to_make_progress unification , recalls the romantic , nationalist and patriotic ideals of an Italian renaissance through the conquest of a unified political identity that , by sinking its ancient roots during the Roman period , `` suffered Bodily_harm an abrupt halt [ or loss ] of its political unity in 476 AD after the collapse of the Western Roman Empire '' .