Ironically, the SAS was founded by a Scot.
Some how I am not surprised.
My ancestors claimed Scot/Irish ancestry. I have no paper trail for that, but the traits are still visible in the family.
Some of my ancestors migrated from SC, GA, AL, TX. The Carolina’s were the gateway that many of the Scots used as they moved West. They never seemed to like civilization too much. I was told that spartan living was a trait they acquired by being burned out by the English so often. They did not build lasting structures because they figured they would have to rebuild them anyway.