About 90% of the people are Christian; most were converted and Westernized to varying degrees during nearly 400 years of Spanish and American rule. The major non-Hispanicized groups are the Muslim population, concentrated in the Sulu Archipelago and in central and western Mindanao, and the mountain groups of northern Luzon. Small forest tribes live in the more remote areas of Mindanao.

About 87 native languages and dialects are spoken, all belonging to the Malay-Polynesian linguistic family. Of these, eight are the first languages of more than 85% of the population. The three principal indigenous languages are Cebuano, spoken in the Visayas; Tagalog, predominant in the area around Manila; and Ilocano, spoken in northern Luzon. Since 1939, in an effort to develop national unity, the government has promoted the use of the national language, Pilipino, which is based on Tagalog. Pilipino is taught in all schools and is gaining acceptance, particularly as a second language.

English, the most important nonnative language, is used as a second language by many, including nearly all professionals, academics, and government workers. Only a few Filipino families retain Spanish usage.

Despite this multiplicity of languages, the Philippines has one of the highest literacy rates in the East Asian and Pacific area. About 90% of the population 10 years of age and older are literate.

Pre-Spanish Period
The first people in the Philippines, the Negritos, are believed to have come to the islands 30,000 years ago from Borneo and Sumatra, making their way across then-existing land bridges. Subsequently, people of Malay stock came from the south in successive waves, the earliest by land bridges and later in boats called barangays. The Malays settled in scattered communities, also called barangays, which were ruled by chieftains known as datus. Chinese merchants and traders arrived and settled in the ninth century A.D. In the 14th century, Arabs arrived, introducing Islam in the south and extending some influence even into Luzon. The Malays, however, remained the dominant group until the Spanish arrived in the 16th century.

Spanish Period
Ferdinand Magellan claimed the Philippines for Spain in 1521, and for the next 377 years, the islands were under Spanish rule. This period was the era of conversion to Roman Catholicism. A Spanish colonial social system was developed, complete with a strong centralized government and considerable clerical influence. The Filipinos were restive under the Spanish, and this long period was marked by numerous uprisings. The most important of these began in 1896 under the leadership of Emilio Aguinaldo and continued until the Americans defeated the Spanish fleet in Manila Bay on May 1, 1898, during the Spanish-American War. Aguinaldo declared independence from Spain on June 12, 1898.

American Period
Following Admiral Dewey's defeat of the Spanish fleet in Manila Bay, the United States occupied the Philippines. Spain ceded the islands to the United States under the terms of the Treaty of Paris (December 10, 1898) that ended the war.

A war of resistance against U.S. rule, led by Revolutionary President Aguinaldo, broke out in 1899. Although Americans have historically used the term "the Philippine Insurrection," Filipinos and an increasing number of American historians refer to these hostilities as the Philippine-American War (1899-1902), and in 1999 the U.S. Library of Congress reclassified its references to use this term. In 1901, Aguinaldo was captured and swore allegiance to the United States, and resistance gradually died out.