No, democracy wasn't invented by the Founding Fathers nor the indigenous peoples, who had many cultures and languages. They relied on many sources not only in Europe, but the Bible and all the way back to the Greeks and Romans. No one ever learned the nonsense of this straw man poster misinformation which first tells a lie, then reports to correct the lie. Also, we don't have a Democracy, we have a Republic. The Founders were brilliant men with flaws who knew they stood on the shoulder of giants. We have tiny shriveled gnomes today who don't think, plan or read history, whose ideas are rooted in Marxism and the divine right of kings.
Yes, the archives belong to the victors as we say in the library field, however, we are fortunate to have many original documents, although well hidden and disguised in government schools today. There was a real fascination with everything Indian if you check 19th sources. And if you go back to 16th and 17th c. sources, some Europeans were horrified by the behavior and culture they found--and obviously saw their own culture as superior (although not by our enlightened, humanist standards where we sacrifice the unborn for personal gain but not usually living children).