“The spirit of our American radicalism is destructive and aimless [...].”
"[...]." above indicates omission of words at the end of a sentence, and fourth dot (outside the ending bracket) is the proper terminal punctuation.
***************** “This is beautiful country [...]”
"[...]" (minus the fourth dot outside the second bracket) indicates that the sentence deliberately trailed off; hence, no fourth dot outside the second bracket.
Are these uses of the sentence-ending bracketed ellipses correct? I would say, logically, yes.
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