The congress was very powerful at the time and needed to be put in line. The two branches were created to control it. The remaining two branches were not specifically enumerated as thoroughly because they were still weak at the time and their power developed over time.
The question can be classified as to what purpose they will use their power. Either for selfishness or selflessness. For selfishness, they are corrupt and will make their people suffer. For selflessness, they will try to find answers or solve common issues for the people and or for the country.
Autocracy. An autocracy is a system of government in which supreme power is concentrated in the hands of one person, whose decisions are subject to neither external legal restraints nor regularized mechanisms of popular control
He conserved forests and wildlife after Harold Ickes convinced him to build a wildlife reserve.