The main thing which the feudal system was based on was land ownership.
<h3>What is Feudalism?</h3>
This refers to the social system that was mainly used in medieval Europe where a lord gave land to his vassals as a reward,
Hence, we can see that your question is incomplete so a general overview of the feudal system was given to help you get a better understanding of the concept.
Read more about feudalism here:
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When genetic molecules are broken down and deciphered under a large scale then the defects can be magnified and researched and further stopped. Hopefully with the scientific advancements at hand and with enough people to come forward to participate in the study these diseases and genetic defaults will cease.