How do manners/etiquette help to develop the theme of Daisy Miller?

Manners and etiquette are the main anchor that develops
the theme of the short story Daisy Miller by Henry
James.

Society has many different ways to evaluate behavior
and at times has gone out of its way to establish parameters (and impose limitations) as
to what is considered acceptable, fashionable, ethical, moral, good, or
bad.

The story of Daisy Miller (as a character) presents a
young lady to whom these parameters and limitations mean very little, and whose self
confidence and aloofness brings others to confuse it with loose behavior and libertine
ways.

The way in which she cuts away from the expectations
of aristocratic and posh Europeans is a direct slap in the face of society, which
ensured that ladies (particularly young ones) would be preserved almost as if pickled
within those extreme behavioral parameters.

Equally, those
same limitations played on the freedoms of some of the characters. Winterbourne was
never able to make a close approach to Daisy on account of the lack of etiquette and
manners that Daisy showed. Society was never able to understand Daisy, not even
Winterbourne. That is how these two factors are so important for the development of the
story.