Yawn, it's clear you don't know how to read literature from the period. There's plenty of explanation of the phrasing, indeed by the writers themselves in contemporary missives. But you don't really care, you already have your ideology.
Go read any Jane Austen and you'll learn. Even better, the Federalist Papers, or the Adams/Jefferson letters.
Yawn, this ignorant trope again. Go learn to read 17th and 18th century prose.