Original sentence: Within Italy, Italians are defined by citizenship, regardless of ancestry or country of residence (though the principle of jus sanguinis is used extensively and arguably more favorably in the Italian nationality law), and are distinguished from people of Italian descent and, historically, from ethnic Italians living in territories adjacent to the Italian Peninsula
Edited sentence: Within Italy, Italians are defined by citizenship, regardless of ancestry or country of residence (though the principle of jus sanguinis is used extensively and arguably more favorably in the Italian nationality law), and are distinguished from people of Italian descent and, historically, from ethnic Italians living in the unredeemed territories adjacent to the Italian Peninsula