Explains four reasons for the framers’ inclusion of the diversity clause in the Federal Constitution: (1) to preserve national peace and harmony; (2) ensure that all citizens have the privileges and immunities of citizens in the several states; (3) ensure fair and impartial adjudication between citizens of different states, unaffected by local politics; and (4) discharge the duty of the national government to provide adjudication with fairness and efficiency. Largely employs original intent originalism. Concludes that curtailing federal court jurisdiction should not occur lightly.