I used to hear of them as a distinct group, but not so much anymore, even though other people seem more aware of their Scottish, Armenian, Basque, etc. heritage than they were a few years ago.
Please correct any errors in what I think I know about them, and add to what I’m sure I don’t understand.
What I think I know is that the Scots originated in Ireland, migrated to Scotland and merged with the Picts in the early Dark Ages, and in the 16th century were thrown off their farms when the landlords replaced small farms with large sheep enclosures. This coincided with England’s consolidation of Cromwell’s invasion of Ireland, when they replaced Irish farmers with Scots settlers in Ulster. But, until the Industrial Revolution arrived, there wasn’t much to support people in Ulster, so after a few generations the Scotch-Irish moved again, to America. Since the Tidewater and Piedmont were already settled by Englishmen, the Scotch-Irish moved into Appalachia and beyond. Or maybe I’d just dreamed all that after eating Welsh rarebit.
Among my vast storehouse of non-knowledge are questions as to why the predominant religions of the American South were Methodism and Baptism, but not traditional Scots Presbyterianism. John Wesley’s revolution would account for many conversions to Methodism, but didn’t the Baptists originate in Germany? And were there large migration destinations for the Scotch-Irish besides the American South, like Canada, Australia & New Zealand? Is being Scotch-Irish a lost identity; in that plenty of them identify themselves as Southerners, but how they originally got down south is immaterial? And finally, why have I always read it as Scotch-Irish? We’ve been told that Scotch is a drink, but the Scots are a people.