This would not be a government, but a Dictatorship. This is where a single person controls a whole country/nation.
Tyranny, or monarchy, or autocracy. The variations are based on how the person obtained supreme power. A monarch inherits power from his father. An autarch is selected, but then rules without restriction. A tyrant seizes power for himself.
a single person or a small group of people
a group of nations ruled by a single person or government
This would not be a government, but a Dictatorship. This is where a single person controls a whole country/nation.
Simón Bolívar was the first president of Gran Colombia
Autocracy is a system of government whereby supreme power is held by a single person. North Korea could be considered autocratic as its supreme leader is Kim Jong Un.
If the government is run by a single person, sometimes it's called a dictatorship, regardless of the title that the single person assumes.
autocratic government
When diverse peoples form a single nation, this process is called nation-building or nation formation. It often involves the integration of various ethnic, cultural, or social groups into a cohesive national identity. This can be achieved through shared values, common goals, and the establishment of a unifying political framework. Successful nation-building fosters a sense of belonging and collective identity among the diverse populations.
As a group, it is a population; a single person is a citizen. The people of a place are also called inhabitants; or a single person is an inhabitant.
This information is called his/her marital status.