"Charles the Bold, for example, was a vassal of the Holy Roman Emperor for part of his lands; in other parts, he was a vassal of the King of France. On the other hand, the King of France, Charles' lord in regard to these territories, was the vassal of Charles in regard to others. How could conflict be avoided in a situation like that?"

I'll tell you how, you simpleton, you fool.

the trustless immutable blockchain is how. [offers the Holy Roman Emperor stock in my ICO]