The Irish Diaspora by Turtle Bunbury The compelling story of the great Irish pioneers who left their homeland and in the process profoundly influenced their adoptive countries. From the first voyages of Saint Brendan in the early sixth century, an estimated 10 million people have left the Irish shores for other countries, and today, more than 80 million people worldwide claim Irish descent. In the centuries after the fall of Rome, Irish missionaries carried the word of the Christian God throughout Europe, while soldiers and mariners from across the land ventured overseas in all directions. The advent of the British Empire ignited a slow but extraordinary exodus from Ireland. These "Wild Geese" who opted to live outside of the Protestant state took their chances in the Spanish and French empires, as well as in the fledgling New World.