Without looking it up I believe the brilliant Maya culture flourished
ca. 600-900, making it about 100 years older than the saga-era
Vikings, and the near contemporary of what is informally called the
Dark Ages in Europe. The Maya were in several ways more advanced
than the Vikings:
- They were independently literate (the Vikings had taken their alphabet from the Latin)
- They were far ahead in mathematics, having famously invented a calendar more advanced than any other before the 20th century.
- They were far ahead in urban engineering, with their monumental temples and large cities.
And no doubt they excelled in other areas I do not know of.
Strangely however, the succeeding advanced urban societies of
Mesoamerica retrogressed in the art of letters, and were illiterate.
Nor did they ever develop metallurgy other than ornamental, and
they failed to discover the utility of the wheel. It is also strange
that advanced urban culture never developed in the several million
square miles of prime land north of the Rio Grande. I doubt we
will ever understand the social dynamics leading to these conditions.
I do not think there is much doubt that the combination of literacy,
steel, and literacy gave the Europeans an unbeatable advantage
when contact was reestablished with the Americas 500 years after
the Viking era.