The Shang dynasty exist and probably will last much longer this time around thanks to knowledge of the future and advanced technology. Plus they don't have to worry about overpopulation or environmental damage that modern China has yet the CCP is still in power and will continue to do so
Scientific theory, experimentation, decline of resources wasted on religion but instead spent on actual tech research and the fact that X-rays are real means they will be invented sooner than later
Ancient Egyptians/Greeks figured out on their own the Earth isn't flat in Real Life. They can figure out everything much faster with all the knowledge and technology gained from the Americans
By 20 AE even the Proto-Somalians and Proto-Germanians are adopting, sometimes by murdering their obselete priests, American ideas and technology. Time-wasting Prayers and wasteful animal sacrifices don't work against bronze spears much less muskets and gunpowder grenades!
Tribes that wash their hands and try to maintain better sanitary practices do better than tribes that don't. That benefit increases with each year/generation and forces other tribes to adapt similar practices or be competed out or conquered by their newly empowered neighbors
Imagine if the same tribe that first accepted germ theory also were the first to embrace gunpowder warfare over their religious-superstitious neighbors
Shaka Zulu didn't have guns, germ theory, books and metal armor when he carved out his empire
theinventors.org
You're telling me people are incapable of making these 18th century inventions within 10 years?
Inventions of the 19th Century
Make some of these inventions by 20 years?