I'm afraid my studies contradict most of this nonsense. The only things you've said that agree with my studies is your naming of the four castes and what they generally represent.
"GARGI: Yajnavalkya, as a warrior from Kashi or Videha rises with a bow and arrow to fell his opponent, I rise to fell you with two questions.
YAJNAVALKYA: Ask them, Gargi.
GARGI: That which is above heaven and below the earth, which is also between heaven and earth, which is the same through past, present, and future, in what is that woven, warp, and woof? Tell me, Yajnavalkya.
YAJNAVALKYA: That which is above heaven and below earth, which is also between heaven and earth, which is the saem through past, present, and future - that is woven, warp, and woof, in space.
GARGI: My first question is answered well. Now for my second question.
YAJNAVALKYA: Ask, Gargi.
GARGI: In what is space itself woven, warp, and woof? Tell me, Yajnavalkya.
YAJNAVALKYA: The sages call it Aksara, the Imperishable. It is neither big nor small, neither long nor short, neither hot nor cold, neither bright nor dark, neither air nor space. It is without attachment, without taste, smell, or touch, without eyes, ears, tongue, mouth, breath, or mind, without movement, without limitation, without inside or outside. It consumes nothing, and nothing consumes it.
In perfect accord with the will of the Imperishable, sun and moon make their orbits; heaven and earth remain in place; moments, hours, days, nights, fortnights, months, and seasons become years; rivers starting from the snow-clad mountains flow east and west, north and south, to the sea. (Side note: assuming you're actually reading this, I expect you to be mature and ignore the obvious scientific inaccuracy in this portion; the actual movements of planets and stars is irrelevant to the lesson.)
Without knowing the Imperishable, Gargi, whoever performs rites and ceremonies and undergoes austerities, even for many years, reaps little benefit, because rites, ceremonies, and austerities are all perishable. Whosoever dies without knowing the Imperishable dies in a pitiable state; but those who know the Imperishable attain immortality when the body is shed at death.
The Imperishable is the seer, Gargi, though unseen; the hearer, though unheard; the thinker, though unthought; the knower, though unknown. Nothing other than the Imperishable can see, hear, think, or know. It is in the Imperishable that space is woven, warp, and woof.
GARGI: Venerable brahmins, count yourselves fortunate if you get away with merely paying this man homage. No one can defeat Yajnavalkya in debate about Brahman."
-Brihadaranyaka Upanishad
As for the so-called "caste" system... (or, more properly, Varnasrama Dharma)
"The social orders are (1) Brahmins - intellectuals or priestly people; (2) Ksatriyas - politicians, administrators, and warriors; (3) Vaisyas - farmers, merchants, or economists; and (4) Shudras - laborers and artisans. Individuals naturally fit into one or more of these occupational divisions ... based on their qualifications and work. It should be emphasized that the original system was based upon quality and inclination, not on birth."
-Steven J. Rosen, "Essential Hinduism"
I'm starting to doubt that you're even reading my posts (and I mean really READING), and just arguing for the sake of arguing.