They may not have invented the wheel, but that was because they had no animal capable of pulling a wheeled vehicle. Similar situation in the Americas. The Incas and Aztecs knew about the wheel and there have been wheeled toys found there, but there was no animal capable of pulling a wheeled vehicle there either.
That is simply not true. The natives of North America used dogs to pull a travois in southern portion of NA and used dogs to pull sleds in northern NA. If dogs can be used to pull a sled over dry ground or snow, they can certainly be used to pull a wheeled vehicle. Moreover, bison have been domesticated in modern times, it is conceivable that bison could have been domesticated in ancient time, and bison are certainly large enough to not only pull a wheeled vehicle, but plows and water wheels.
South America has large herbivores too, such as the llama, an animal quite capable of pulling a wheeled vehicle today, I'm sure they could have done so thousands of years ago.
When the Europeans showed up the Native Americans were stuck firmly in the stone age so it should surprise nobody that they had yet to utilize the wheel. Interestingly, the very ancient native Americans mined and smelted copper, primarily in the upper great lakes region. But this culture died out 1500 years before European settlers arrived.
These are a sampling of artifacts found in Northern Michigan and Wisconsin dating from circa 3000-1000 BCE
Edited by DKTanker, 12 January 2018 - 1905 PM.