Europeans settle on europe: 40000BC
Amerindians reached Canada: 25000BC; then after the deglaciation (10000 years later) populated the rest of the continent in 15000BC
European crops date from 10000BC.
Amerindian crops date from 6000BC.
Europeans getting the bronze from other culture in 3200BC.
Amerindians reached the bronze age in 500BC approximately.
Also as a great factor:
Horse domesticated in 3000BC approximately.
Knowing that the rests of all amerindian populations of 14000BC to 10000BC were pretty much paleolithical-tier and all lived as nomads, practiced some artistic manifestations as european paleo-populations. It's safe to assume they started again in the paleolithic and had to morph the environment of woods, jungles and coasts to their convenience, the same the europeans did with their environment for thousands of years before the Neolithic.
Then let's compare:
Europeans lurking around as nomads: 30000 years.
Amerindians lurking around as nomads: 9000 years.
Europeans reaching the bronze age from other cultures after the Neolithic stage: 6800 years.
Amerindians reaching the bronze age by themselves without the influence of a culture thousands of years ahead of development: 5500 years.
Let's check also how many years have humans modifed the horse population and environment: 37000 years.
Let's check how many years have amerindians affected the camelids of South-America, when the spaniards came: 16500 years. They had less than half the time, yet they already domesticated diverse species for food and whool. Llamas can carry up to 50 Kg.
And I didn't mention the disadvantages such as continental isolation (north-south and east-west), Niño fenomena that destroys coastal villages, less cultures to trade with, and no naval technology, iron, horses, wheel, and writting from north-african nor anatolian cultures.
So, it's safe to affirm. Incas were superior to europeans. Their higher development rate was excellent compare to europeans.
