What is the main reason for the emergence of feudalism?

There are more than enough reasons for the emergence of feudalism. However, it is worth dwelling on two main ones that influenced its origin. This is, first of all, the crisis of the slave system. People needed some kind of reformation of this order. And the second is the Great Nations Migration. Peoples shifted, traditions and rights were eroded, lands became the property of those who came to a certain land.

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