Answer:
a theory can't be a fact because if it was a fact it would no longer be theory
Explanation:
Ethnic groups from outside disrupted the inner structure of these nations. This caused them to fall.
Answer: The model federal state is characterized by the existence, at the national level, of a written, rigid constitution guaranteeing the several intermediate governments not only permanence and independence but also a full complement of legislative, executive, and judicial powers.
Explanation:
