First of all Democracy was not a greek invention, there were democracies in India long time ago, Kalinga was a state in India.....
Kalinga is the oldest known democracy in the world. It was a kingdom in the current Indian state of Orissa.
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I have no idea if Kalinga was a democracy or not 2 thousand years ago, and it really doesn't matter, but thanks for that piece of history, I wasn't aware.
What matters is who spread this concept, of democracy, worldwide, and made it flourish? Was it Kalinga, or the descendants of the Roman world?
Yes, the European always borrowed and used what was best from other civilizations, be it gunpowder, numerals or gods, and will continue to do so. So what? The Romans did the same, all the time, and that kind of pragmatism is, IMHO, the "winning card"
The rest of your post turned defensive, with the final paragraphs being crystal ball type predictions, with really nothing to debate.