Old Stock Americans, Pioneer Stock, or Colonial Stock are Americans who are descended from the original settlers of the Thirteen Colonies of European ancestry who emigrated to British America in the 17th and the 18th centuries.
Some Old Stock Americans, primarily English Protestants, saw Catholics as a threat to traditional American republican values, as they were loyal to a foreign pope.
Settlement in the colonies
Between 1700 and 1775, the overwhelming majority of settlers to the colonies (around 75%) were Britons of varying ethnic backgrounds such as English, Scottish, Welsh, and Ulster-Scots with initial settlements focused on the colonial hearths of Virginia, New England and Bermuda under Elizabeth I, James VI and I and Charles I. By 1776 there were between 2 and 2.5 million colonists in the Thirteen Colonies.
Early European settlers
Populations of French Huguenots, Dutch, Swedes, and Germans arrived before 1776, some as fellow royal subjects, other populations as legacies of earlier colonies such as New Netherland, which became the Middle Colonies of British America, and the Dutch colonial capital of New Amsterdam retained a distinct commercial cosmopolitan character as New York which became America's largest city. Ethnic Finns made up the majority of settlers of New Sweden colony which passed to Dutch and English rule. While small in number, Forest Finns left an outsized legacy, among European Americans uniquely accustomed to a pioneer life taming wilderness on frontiers of the Swedish Empire, bringing slash-and-burn agriculture and resourceful timber usage to the New World in the 17th century. From Tavastia, Savo and Karelia, Finnish log cabin architecture arrived early in colonial America, like the 1638 Nothnagle Cabin–adopted by later pioneer settlers like the Scotch-Irish to become symbols of American frontier culture advancing westward across North America. As the Scotch-Irish first resettled Ulster from the violent Scottish borderlands before departing for America, Forest Finns lived on the rough frontier borderlands of eastern Finland until the Swedish king invited them to resettle and clear wooded central Sweden, before remigrating to America. In 1776, a descendent of Finnish New Sweden settlers, John Morton, joined Benjamin Franklin and James Wilson to cast the deciding vote of the Pennsylvania delegation in support of independence and became a signer of the Declaration of Independence two days later.
British settlers in New England
While the majority of colonists were from Great Britain, these were not monolithic in ethnic, political, social, and cultural origins, but rather transplanted different Old World folkways to the New World. The two most significant colonies had been settled by opposing factions in the English Civil War and the wider Wars of the Three Kingdoms. The founders of Plymouth and Massachusetts Bay Colony in the North were mostly Puritans from East Anglia, who had been influenced by egalitarian Roundhead republican ideals of Oliver Cromwell's Commonwealth of England and the Protectorate; in New England they concentrated in towns where decisions were made by direct democracy, prizing communal conformity, social equality, and Puritan work ethic. Partially owing to the insularity of Puritan communities, colonial New England was far more homogeneously "English" than other regions, in contrast to the historically tolerant Dutch colonial parts of the Northeast, and more diverse colonies of the Mid-Atlantic and the South which from an early stage had strong elements of German and Scottish stock, from varying religious traditions.