What were the six legal principles that originated in Rome?

 {Kirito here! I believe the answer is this-}

Roman law, the law of ancient Rome from the time of the founding of the city in 753 bce until the fall of the Western Empire in the 5th century ce.It remained in use in the Eastern, or Byzantine, Empire until 1453.As a legal system, Roman law has affected the development of law in most of Western civilization as well as in parts of the East.

Explanation:

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to provide for the common defense to form a more perfect union to promote the general welfare

an expansion is one of two basic business cycle phases; the other is contraction. the transition from expansion to contraction is a peak, and the changeover from contraction to expansion is a trough.