The Objective Aspect of Style
Like any other art form, dressing intentionally is largely personal and subjective.
This is why styles change from decade to decade, country to country, and culture to culture.
That said, there are some universal components of dressing intentionally that can be applied regardless of where, when, or with whom you live.
Knowing these aspects of what makes you look great (or awful) and then applying them to the personal manifestation of your style is exactly what's necessary to look your best.
A sculptor needs to understand the nature of marble.
A painter must know how watercolors work.
A pianist learns the music theory.
And you need to have the Science of Style