It's called an oligarchy. In the 20th century, some fascist governments might fall into that category, in that the one person ruler might delegate to a few of his close associates to handle some areas of the government without needing the leader's permission.
Ramses great temple and mount Rushmore were both built for a group of people.
Oligarchy is government by the few. Plutocracy is government by the wealthy few.
A Republic - where individuals are chosen by the people to represent them and the group of individuals so chosen make the decisions as a group.
The only groups of Romans with names were in the military and in government. In the military a group could be called anything from a contuberium to a legion, depending upon how many were in the group. In government the main group was the senate followed by the various "veri", such as deciumveri, which were committees.
A trio is one name of a group of three people. It's called a trio.
Authoritarianism
When the government controls everything, It is called Command/Communism
The democratic theory of government makes the case that no one group of people controls the majority of government decisions.
One person controls everything in the country; he came to power by overthrowing the previous government.
government that controls all aspects of life by a group of people
An oligarchy is a form of government in which an elite group controls the government.
Bureaucray: The Group of people that help run a government .
what type of government is demonstrated when one person or a small group holds sovereignty
They both are types of government, and both have a person/group of people who govern.
government
A complex institution is a governing system that controls the behavior of people around it. It works by means of of certain rules of behavior that are enforced by a person or group of people responsible for punishing people that do not follow them. One of the most common examples of complex institutions is a government.
Dictatorship