Francis Vineyard said:
Who decides what is correct and incorrect grammar? The grammar of a language is decided by the group of people who use the language. New grammar rules come into existence when enough members of the group have spoken (signed) their language a particular way often enough and long enough that it would seem odd to speak the language in some other way.
Since Britain’s emigration to America English has slowly morphed into another language.
Perhaps English should be made the official language of the U.S. of A., before the majority of Americans become too dumb to understand the Constitution.
In some circumstances it's proper to end a sentence with a proposition.
First off, the grammatical rules of English was established by England and adopted by United States.
http://en.wikipedia.org/wiki/History_of_English_grammars
This began with William Bullokar. English is fairly structured by the way it is used. Then eventually Robert Lowth who by careful scrutiny of linguistic structure of English and historic origins and the adoption of grammatical rules. It is the academia elites and the AUTHORity of writing and spoken arts determines this. They write the books and have committees that goes about the constructs of proper writing and talking.
English writing as rules like the rules of art as all languages has rules. We establish rules to our language, our arts, our phonology and music, and everything else for there to be uniformity so there will be the ability to communicate to each other.
Like an orchestra, there needs to be choreography. There is a duty and obligation that you use the knowledge you learn for the greater good beyond yourself. This is a government job. It is a Moral Duty. Therefore, the academic elites, professors, authorities in writing and spoken arts takes up the duty by the bootstraps to carry on this art and form. Like a piece of fine art, writing and speech is too. There teachers of these arts have a duty to study the arts to profess it. Then bestow the knowledge of this art.
There can be morphology in the usage to convey a artistic point, yet the fundamental rules still applies.
Architectural art is a visual language with visual elements that communicates a message, concept, expression, symbol, ect. The same is said for writing. English languages has styles like Classical / Tradition to a Contemporary style. Similarly, Architecture has this as well. Some rules of guiding premises may not transfer from style to style and purpose to purpose. Yet, core fundamentals still apply.
It may also be the difference between Classical music and contemporary pop music. Some core fundamental rules apply or there be no melody, rhythm and be pure incoherence. The grammar of writing is like the fine arts. It is there to establish coherence and clear conveyance. The art of communicating is founded on this core root principle. A thought is not conveyed if the audience (or other person) does not understand.