Final answer:
One person having all the power is a characteristic of a dictatorship where a single person or a small group has complete and absolute authority over the government and the population.
Step-by-step explanation:
A student is asking about a situation where one person has all the power. This concept is found in a type of government called a dictatorship. In a dictatorship, power is held by a single person or a small group that has complete and absolute authority over the government and the population. Dictators often use tactics such as economic and military might, intimidation, and brutality to maintain their power. It is important to note that in a democracy, power is vested in the people, not in a single individual.