"Please explain to all of us,
how the number one meaning of the word, 'Gay',
changed from,
being a description of a person who was always a happy go lucky person,
to a description of a person who has sex with the same sex person.

And, how the words, 'bad' and many many others,
changed their meaning."


 You are referencing semantic progression but over-simplifying the acceptance of accuracy which is developed over a longer period of time.  For instance if people start saying anything yellow is "Racist" that doesn't automatically become true and an accepted use of an English word.  "Bad" and "Gay" evolved over decades.  Gay evolved from 12 century to the 1960s.

 Narrowing and Broadening, are mutually exclusive in semantic progression and typically Amelioration and Pejoration are as well however a mix of Narrowing and Amelioration for example can happen.

 What you describe as "Gay" is a mix of broadening and amelioration that still adhere to the rules of Polysemy.

 What you describe as "Racist" is more like a debate of personal opinion as there is no widespread polysemous use of the word in the way you are trying to debate.  

 "Racist" by the methods we are using here would not meet a lexicography standard to alter the semantic progression.  If enough people over the next few decades agree, and use, the term "racist" as any decision that made by race, and excludes the other defining factors, the word "racist" will then become polysemous and eventually end up defined in the way you propose.

 But today, not enough evidence by lexicographic standard applies to have "racist" mean what you are interpreting it to mean at this time.

Eegore wrote on 01/29/22 at 10:18:34:

I didn't know what, was,
"lexicographic standard"
so I looked it up .
And several web pages said essentially the same thing.

"Alphabetical order is a specific kind of lexicographical ordering. The term lexicographical often refers to the mathematical rules or sorting."

"The lexicographic or lexicographical order (also known as lexical order, or dictionary order) is a generalization of the alphabetical order."

"The term lexicographical often refers to the mathematical rules or sorting."

"... shows that conditional probability spaces are equivalent to a subclass of LPS’s called lexicographic conditional probability spaces (LCPS’s) if the state space is finite and it is possible to condition on any nonempty set ..."


Can you explain, how the alphabetical order of a word,
changes it's meaning ?

Lexicographic is pertaining to words, from the word lexicon.
The order and the standard are where you're confused.

A standard... would be the generally accepted meaning of a word.  Meanings change over time.  Words can have more than one definition. Language is not static.
We don't say thee and thou much any more.

"Gay" does mean happy, in fact usually more than just happy, or perhaps happy to the point of frivolity.
It became an insult to insinuate that homosexuals were frivolous and flaunting standard behavior.
But, rather than be insulted, gays adopted the label as their own, thereby rendering it harmless.

Once a word becomes universally defined as meaning something, it joins the standard lexicography.

...but why are you trying to make this political issue?



PS
Guess what word has the most different definitions listed in the dictionary?





Run
You wanna' gripe about the word run?