Horace Walpole correctly predicted the disastrous consequences, Britain’s American colonies no longer needed British protection and thus refused to pay taxes. Thirsting for revenge, France assisted them throw off British rule during the American War of Independence (1775-83).
If Walpole’s advice had been heeded, France would have been allowed to retain at least Quebec (which, in any event, remains Francophone). Britain, as protector, would have retained its American empire and status a super-power. Instead, its hegemony was replaced by that of its former colonies, the United States of America.