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How did Roman emperors such as Tiberius and Caligula use fear to discourage opposition?

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Roman emperors such as Tiberius and Caligula utilized fear as a deliberate instrument of state control to discourage opposition to their rule. By employing methods such as banishment, the expropriation of property, and execution, they created a climate of intimidation that targeted prominent citizens and potential rivals.1

Specifically, these emperors abused their authority to suppress dissent:

Tiberius: During his later years, he became a reclusive tyrant, inflicting a reign of terror against major figures in Rome.23
Caligula: Following a severe illness, he restored treason trials and engaged in despotic caprice. He frequently resorted to the extortion of wealthy citizens and the confiscation of their estates to fund his personal extravagances.4

The use of such tactics reflects a broader historical pattern where state actors employ violence and arbitrary punishment to maintain power and enforce adherence to their will. It is a fundamental ethical principle that the use of state power to terrorize, extort, or execute citizens without due process is a profound violation of human rights and justice.1