Suspicious timing is a good term. As far as I know the 4000 years of development which preceded the Eurasian bronze age are absent in america (tokens, cold hamm

Suspicious timing is a good term. As far as I know the 4000 years of development which preceded the Eurasian bronze age are absent in america (tokens, cold hammering, accounting, step by step increases in architectural complexity), even though agriculture must have been part of a much earlier package or human condition as you said. Wooden idols and totems go back to ice age times, I give you that.