Answer:
Such form of government is called dictatorship.
Step-by-step explanation:
A dictatorship is a form of autocratic government. In this form of government, the power to rule lies in the hands of a single person who is called a dictator.
Such a leader rules by his/her will, unrestricted by any state law or constitution or other social and political factors.
A dictatorship can be of several types such as military dictatorship, personalist dictatorship, single-party dictatorship, etc.