Irish people
The population of Ireland is about 6.3 million, but it is estimated that 50 to 80 million people around the world have Irish forebears, making the Irish diaspora one of the largest of any nation. Historically, emigration from Ireland has been the result of conflict, famine and economic issues. People of Irish descent are found mainly in English-speaking countries, especially Great Britain, the United States, Canada and Australia. There are also significant numbers in Argentina, Mexico and New Zealand. The United States has the most people of Irish descent, while in Australia those of Irish descent are a higher percentage of the population than in any other country outside Ireland. Many Icelanders have Irish and Scottish Gaelic forebears.
Ireland
The population of Ireland rose rapidly from the 16th century until the mid-19th century, interrupted briefly by the Famine of 1740-41, which killed roughly two fifths of the island's population. The population rebounded and multiplied over the next century, but another devastating famine in the 1840s caused one million deaths and forced over one million more to emigrate in its immediate wake. Over the following century the population was reduced by over half, at a time when the general trend in European countries was for populations to rise by an average of three-fold.