The Irish people are mainly of Celtic origin, with the country's only significant sized minority having descended from the Anglo-Normans. English is the common language, but Irish (Gaelic) is also an official language and is taught in schools.
Anglo-Irish writers such as Swift, Sheridan, Goldsmith, Burke, Wilde, Joyce, Yeats, Shaw, and Beckett have made a major contribution to world literature over the past 300 years, with four Irish writers having won the Nobel Prize for Literature.
The earliest inhabitants--people of a mid-Stone Age culture--arrived about 6000 BC. About 4,000 years later, tribes from southern Europe arrived and established a high Neolithic culture, leaving behind gold ornaments and huge stone monuments. The Bronze Age people, who arrived during the next 1,000 years, produced elaborate gold and bronze ornaments and weapons.
The Iron Age arrived abruptly in the fourth century BC with the invasion of the Celts, a tall, energetic people who had spread across Europe and Great Britain in the preceding centuries. The Celts, or Gaels, and their more numerous predecessors divided into five kingdoms in which, despite constant strife, a rich culture flourished.
The coming of Christianity from across the Irish Sea brought major changes and civilizing influences. Tradition maintains that St. Patrick arrived on the island in AD 432 and, in the years that followed, worked to convert the Irish to Christianity.
The pagan druid tradition collapsed before the spread of the new faith, and Irish scholars excelled in the study of Latin learning and Christian theology in the monasteries that flourished. Missionaries went forth from Ireland to England and the continent, spreading news of the flowering of learning, and scholars from other nations came to Irish monasteries. The excellence and isolation of these monasteries helped preserve Latin and Greek learning during the Dark Ages. The arts of manuscript illumination, metalworking, and sculpture flourished and produced such treasures as the Book of Kells, ornate jewelry, and the many carved stone crosses that dot the island.
Two hundred years of Viking invasion and settlement was later followed by a Norman conquest in the 12th century. The Norman conquest resulted in the assimilation of the Norman settlers into Irish society. The early 17th century saw the arrival of Scottish and English Protestants, sent as colonists to the north of Ireland and the Pale around Dublin.
In 1800 the Irish parliament passed the Act of Union with Great Britain, and Ireland was an official part of the United Kingdom until 1921. Religious freedom, outlawed in the 18th century, was restored in 1829, but this victory for the Irish Catholic majority was overshadowed by a severe economic depression and the great famine of 1846-48 when the potato crop failed. Millions died, and millions more emigrated, spawning the first mass wave of Irish emigration to the United States. A decade later, in 1858, the Irish Republican Brotherhood (IRB--also known as the Fenians) was founded as a secret society dedicated to armed rebellion against the British. An above-ground political counterpart, the Home Rule Movement, was created in 1874, advocating constitutional change for independence.
Galvanized by the leadership of Charles Stewart Parnell, the party was able to force British governments after 1885 to introduce several home rule bills. The turn of the century witnessed a surge of interest in Irish nationalism, including the founding of Sinn Fein ("Ourselves Alone") as an open political movement.
Nationalism was and is a potent populist force in Irish politics. A home rule bill was passed in 1914, but its implementation was suspended until war in Europe ended. Believing the mantra: "England's problem is Ireland's opportunity," and tapping into a mood of Gaelic revivalism, Padraic Pearse and James Connolly led the unsuccessful Easter Rising of 1916. Pearse and the other 1916 leaders declared an independent Irish republic, but a lack of popular support doomed the rebellion, which lasted a week and destroyed large portions of Dublin. The decision by the British military government to execute the leaders of the rebellion, coupled with the British Government's threat of conscripting the Irish to fight in the Great War, alienated public opinion and produced massive support for Sinn Fein in the 1918 general election. Under the leadership of Eamon de Valera, the elected Sinn Fein deputies constituted themselves as the first Dail. Tensions only increased: British attempts to smash Sinn Fein ignited the Anglo-Irish War of 1919-1921.
The end of the war brought the Anglo-Irish treaty of 1921, which established the Irish Free State of 26 counties within the British Commonwealth and recognized the partition of the island into Ireland and Northern Ireland, although this was supposedly a temporary measure. The six predominantly Protestant counties of northeast Ulster--Northern Ireland--remained a part of the United Kingdom with limited self-government. A significant Irish minority repudiated the treaty settlement because of the continuance of subordinate ties to the British monarch and the partition of the island. This opposition led to further hostilities--a civil war (1922-23), which was won by the pro-treaty forces.
In 1932, New York-born Eamon de Valera, the political leader of the forces initially opposed to the treaty, became Prime Minister, and a new Irish constitution was enacted in 1937. The last British military bases were soon withdrawn, and the ports were returned to Irish control. Ireland was neutral in World War II. The government formally declared Ireland a republic in 1948; however, it does not normally use the term "Republic of Ireland," which tacitly acknowledges the partition, but refers to the country simply as "Ireland."
Sources:CIA World Factbook (November 2011)
U.S. Dept. of State Country Background Notes ( November 2011)