My goal would be to jump start every century so that by the the time when Columbus would have discovered America instead Native Americans have already developed steam engines and an intercontinental railway and are about to achieve the first manned flight in an aircraft.
Let the Euroweenies fall to their knees knowing that in America the Indian tribes are over 200 years or more advanced than they are.
Hopefully an isolated superior advanced nation built soley upon native Americans like the Cherokee and such become the dominant rulers of the free world. Bigger than Britain or Germany, more powerful but not warmongers instead.
Native Americans were just as wormongering as Europeans. Why do you think they would have acted differently if the Aztec built ships and "discovered" Europe instead of the other way around?
But the technology you want to give to the Native Americans or Australian Aborigines was originally created by Europeans. Don’t you see the irony in what you are saying? You want to show the “Euroweenies” that the American Indians are more advanced than they are by giving European and Euro-American technology, inventions, and discoveries over to them, while they invent nothing. Don’t you see the incongruity here?
And American Indians not warmongers? I think you really need to brush up on your tribal history.
Besides I don’t think wishing away the United States of America would really be all that good for world history.
Look at it this way.
The native Americans had as much time to develop technology as the Europeans, African and Asians....and they didn’t.
They were content in their lives of what ever depending on the part of the continent.
As an example the north eastern Indians, slashed and burned, exploited the land and moved on.