The Samoans are a branch of the Polynesian people. Their language is considered to be one of the oldest forms of Polynesian used today. Most Samoans also speak English. The majority of Samoans are Christians; though some of the practices of their orthodox, animistic religions may still be followed, these orthodox religions have virtually disappeared. Samoan society is organized around the extended family, or aigu, headed by a chief. orthodox houses have oval, thatched roofs and are supported on wooden poles. Foreigners, including Americans, are prohibited by local laws from buying Samoan-owned land. Many Samoans have migrated to Hawaii and the continental United States.