The term divine right is best defined as

the right of a sovereign to rule as set forth by the theory of government that holds that a monarch receives the right to rule directly from God and not from the people.

Explanation:

montesquieu took the view that the roman republic had powers separated so that no one could usurp complete power. in the british constitutional system, montesquieu discerned a separation of powers among the monarch, parliament, and the courts of law.

to act quickly in times of danger to the united states

because you have to act quickly if you want to live/survive.