One such term for the type of respect the Romans had for the cultures of the people they conquered is "Enlightened Despotism," since in many ways the Romans allowed existing cultures and practices to remain intact.
The purpose of treaties between the U.S. Government and Indians was to first of all keep peace between the two and give colonists permission to settle Indian land. Hope this helps!
Yes, the president has to take approval of the Congress also fro hiring a person for the position of the director of the FBI. Further, Congress also has powers to remove a person this directorship, under impeachment clauses of the constitution. Under the charges of high crimes and demeanors, the civil officers of the US can be removed from duty.