Generally speaking, for a development such as this to be considered a civilization, there must be some form of government, which regulates to a certain extent the lives of the citizens.
I would say either the first or second one seems the safest choice
The prior to the French Revolution is where the Third Estate has the most people but the least political power.
Ferdinand Magellan
The Portuguese explorer Ferdinand Magellan is often credited as being the first person to have circumnavigated the globe
