[sparklite2]

They never figured out the wheel, did they?

[Darteaus94025]

They didn’t have anything to pull a wagon - except for buffalo.

[Cronos]

Actually they did invent the wheel. But it remained a toy, not more as they didn't have any beasts of burden

We forget just how lucky Eurasians were to have:

• Domesticable crops: wheat, barley ,rice - these are native only to Eurasia and the first two to the fertile Crescent in the Middle East. In contrast the Americas had only corn - and corn lacks the important amino acids tryptophan and lycine, it's best eaten in combination with beans in order to avoid protein deficiency -- the early Pilgrims died of this. Also note that while barley and wheat are somewhat like their ancestors, the ancestors of corn are not even recognizable and barely any nutrition, so the native Americans had a harder time
  
  
• Beasts of burden/animals to husband: Eurasia had horses, cows, camels, sheep, goats, pigs. the Americas had only bison and those were not domesticable - they aren't even domesticated today -- and llams in Peru (far from MesoAmerica and across the equator, so no natural way for it to spread