Religion was repressed, and education ceased. All schools were ordered closed in 1975, and the country's churches were also closed in 1978. Nguema introduced a campaign of 'authenticity', replacing colonial names with native ones: the capital Santa Isabel became Malabo, the main island of Fernando Po was renamed Masie Nguema Biyogo after himself, and Annobón became Pagalu. As part of the same process, Nguema also ordered the entire population to drop their European names and adopt African ones. His own name underwent several transformations, so that by the end of his rule he was known as Masie Nguema Biyogo Ñegue Ndong. Many of the island residents population consisting of Nigerian labourers and traders were forced to evacuate.