Nabis is ruler of Sparta from 207 BCE to 192 BCE, during the years of the First and Second Macedonian Wars and the War against Nabis.

After taking the throne by executing two claimants, he begins rebuilding Sparta's power.

During the Second Macedonian War, he sides with King Philip V of Macedon and in return he receives the city of Argos.

However, when the war begins to turn against the Macedonians, he defectes to Rome.

After the war, the Romans, urged by the Achaean League, attack Nabis and defeat him in the War against Nabis.

He is assassinated in 192 BCE by the Aetolian League.

Sparta's last independent ruler, he represents the last phase of Sparta's reformist period.