For the left-leaning, political identity is liable to be closely intertwined with personal identity. The left is collusive, if not presumptuous: should you get on well with leftists at a party, they will blithely assume that you share the same views on the invasion of Iraq, even if all you've talked about is the canapes.
Edith Wharton was a natural story-teller. As plots do in real life, hers flow directly from character. Her prose is so effortlessly elegant that you're rarely aware as they purl by that the sentences are so pretty. More concerned with what is put than how it is put, she also understood that you only say anything at all when you say it well.