tetsu-katana said:Ok, how about this?
The Chinese arrive, like it`s been suggested, in the first half of the fifteenth century. Instead of having a conquistador mentality, the Chinese desire to become allies with the Aztecs. Trading gold and various other things, the Chinese give the Aztecs musket, gunpowder, and ship technologies. (If the Aztecs have any kind of skill at copying technology, such as the Japanese, they`ll catch on quick. And, if I`m not mistaken, gunpowder could be feasably created in the Mexico area then, with sulfur deposits from local volcanoes.) Let`s also say that a plague sweeps through the Empire fairly early, which gradually immunizes the Aztecs from such diseases. This prompts the Aztecs to reform their religion early (with, as I said before, outlawing such things as human sacrifices).
I would also think that, if the Chinese introduced the horse to North America, it could exist in significant numbers by the time of Cortes` arrival, a hundred years after the Chinese. Could these PODs lead up to Cortes arriving in a significantly more advanced Aztec Empire in 1519, with the Aztecs possessing such as firearms, mounted troops, and a small navy?
I still believe the 1400's is too late for the effects of a plague to be over by 1519, unless Mexico becomes something of a Chinese/native mix, with the loss of native population offset by significant Chinese immigration and settlement. Of course then, you are looking at something quite different from the Aztec Empire. Also, I don't see why the Chinese (who were fully as convinced as the Spanish of their cultural superiority over everybody else - and WERE as superior to the Mesoamericans in social organization and technology as the Spanish) would do anything other than establish a very one-sided and exploitative relationship with Mexico. I also doubt that the Aztec reaction to these plagues you describe would be to "reform" their religion. If anything it would get more demanding of sacrifice - unless the Chinese stopped it.
You need to remember that, at its highest, Mesoamerican civilization was barely a bronze age culture, and in major technological innovations, was rooted entirely in the stone age. As Norman correctly notes, technology had not changed since Olmec times (and in fact one could argue that, in most critical respects, it had not changed since the first farmers started growing corn 5000 years ago in Tehuacan Valley). While they might have adapted to, and adopted Chinese technology over a fairly long period of contact, to have that happen over little more than 100 years, is highly unlikely. It's true the Japanese went awfully far in 100 years, but I would argue the difference between Japan in 1850 and 1950 is far less than between Mesoamerica and Eurasia in the 15th century.
Put the Chinese in Colima in AD 1000 and I might be happy.