The Purpose of the length of the term for a US Supreme Court Justice is to

prevent decisions based on the pressures of maintaining elected office

Explanation: The Supreme court is the judicial branch of the federal government and the highest court in the country. It has jurisdiction over all federal & state courts. The

main purpose of the Supreme court is to interpret the law and defend the Constitution. Often they must hear the cases of lower federal courts and ensure that laws follow the Constitution.

Supreme Court justices have life tenure, which means that they serve until they die, resign or retire, unless they are impeached and removed from office by the Senate for wrongful behaviour. The purpose of this life tenure is to make certain the highest court of the country decide cases based on merit, and not have to worry about the pressure associated with elected office.

julius caesar turned the roman republic into the roman empire by coming in and taking the "dictator" role during the time of a civil war (elites vs lower classes) winning battles and reputation, then declaring him dictator for life

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an early twentieth-century ad for model home blueprints