Why was the era of roman emperor justinian i (529–534) considered significant for the concept of laws throughout history?

It was important because it was then that the codification of Roman Law became a serious issue and Justinian had professionals gather and compile a set of laws over the course of a year. The Codex Justinianus was thus made and it inspired many other legislative systems worldwide.

The main reason for building Hoover Dam was to supply the electrical power necessary to transport 4.4 million acre-feet—over a quarter of the Colorado River's average annual flow—to California.

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