But sometimes, just like a person who falls seriously ill and whose immune system fails to withstand it, the person... dies.
Throughout the long years, one great dynasty after another emerged; half of the time, dynasties fell due to invasions from ethnic groups in seemingly more backward and barbaric remote areas.
Yet there were also one or two occasions when barbaric tribes took over, becoming the new rulers—though such situations usually didn't last long.
The conflict and disparity in cultures led to a situation where the two civilizations couldn't coexist, and the final outcome was either one swallowed the other, or one extinguished the other.
Governance requires many essential conditions:
When a place is too remote, in the absence of telephones, telegraphs, or any effective means of communication—during times when productivity is not sufficiently developed.
