The assumption that there's a "going forward" in which some are "left behind". Progress being, as an unconscious axiom, becoming 'Murrican. You could have used "those who stayed", but you chose "left behind". I'm no disciple of Freud, but I'm a connoisseur of nuance.

Oh, I think it would have been quite different. Fortunately, the aristocratic riff-raff didn't want any part of us:I doubt things would have been much different in the US if the whole population of Europe had moved in during the 19thCE.
"All I say is, kings is kings, and you got to make allowances. Take them all around, they're a mighty ornery lot. It's the way they're raised."
"But dis one do SMELL so like de nation, Huck."
"Well, they all do, Jim. We can't help the way a king smells; history don't tell no way."
"Now de duke, he's a tolerble likely man in some ways."
"Yes, a duke's different. But not very different. This one's a middling hard lot for a duke. When he's drunk there ain't no near-sighted man could tell him from a king."
"Well, anyways, I doan' hanker for no mo' un um, Huck. Dese is all I kin stan'."
"It's the way I feel, too, Jim. But we've got them on our hands, and we got to remember what they are, and make allowances. Sometimes I wish we could hear of a country that's out of kings."
What was the use to tell Jim these warn't real kings and dukes? It wouldn't a done no good; and, besides, it was just as I said: you couldn't tell them from the real kind.
Yeah - largely for the purpose of setting other men free - not land-grabbing. What was the purpose of Europe's two 20th-century bloodlettings?Despite the open land the US managed to have a pretty substantial blood-letting in the 1860's.
No, I meant what do you believe are the causes of the big differences between Europeans and Americans? Again, my hypothesis may be a bunch of Rule 8; I'm curious to hear other explanations (and maybe this would make for a good separate thread...)Your expressed opinion vis-a-vis chran's, for starters.
), so I can't say it has stood up in combat. Or, as Huntsman observed, you don't prove a hypothesis by mollycoddling it; you prove it by ramming it into a brick wall at 60 mph and examining the pieces. If the pieces come from the wall, the theory is sound.