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If that suposition is true then we might especulate that the six amnesiacs were sent from the future to avoid something. A bit like Terminator or so, but still... well spotted, gjamesgang 
My ideas regarding the Run Graph:
The 6 colored lines represent the 6 continental world forms. The grey line is the total sum of all worlds existing simulatanously. The upper limit is the dotted line at 10^11.
In the beginning of the graph everything went more or less well. There should have been already some problems because the total sum was already near the limit. But this could be "adjusted" by ongoing Rapid Continental Changes (RCC). Especially the "purple" worlds are transformed to "light blue" worlds, because they are more "external"
But then 1812 sonething happened. Perhaps the purple worlds have disconnected or were lost. They started to increase rapidly as not involved in any synchronizing anymore.
As a result nature tried to compensate by making RCC to other worlds (which are now more "external" as the purple ones not controlable anymore). This leads to some decreasing in those worlds. Especially "orange" and "blue" are transformed to "light blue" and even "red".
But reality was not able to compensate for the lost "purple" world/ring. So the upper limit was reached 1815 and ... BANG.
Now after 1815 the purple line is still missing! So there are only 5 worlds and one total sum.
Questions:
1) Was the situation already bad 1800 or is this "working on the limit" a normal situation?
3) How do the colors fit to the world forms?
2) What happened 1812 (not 1815)?
