Because people can learn from other people, in both in failures and in successes. The founding fathers of the United States took after the Roman republic in modeling after there government. This is why the United States Congress is structured in the same manner as the Roman Congress. Versus the rectangular or roundtable types of congresses that are seen in European countries.
They also took after the Romans on the idea of a republic being comprised of people elected to represent them. These people are also meant to be changed out on a regular basis. And that the public was in control of who was calling the shots on their behalf.
La respuesta correcta a esta pregunta abierta es la siguiente.
El rey de España impuso a funcionarios civiles a controlar la tierra conquistada en lugar de dejar que gobernaran los conquistadores porque para el rey, los conquistadores eran guerreros, exploradores que no tenían la presencia para gobernar los territorios llamados la Nueva España. El rey consideraba que había entre su gente personas más capacitadas y cercanas a él para poder administrar el amplio territorio conquistado. El primer Virrey de la Nueva España fue Antonio de Mendoza, en marzo de 1535.
I would myself go with The use of tissue and organ transplants or the use of laser technologies to avoid open heart surgery