Starting in the 3rd millennium BC, Failaka belonged to the Dilmun civilization. During the Dilmun era (from ca. 3000 BC), Failaka was known as "Agarum", the land of Enzak, a great god in the Dilmun civilization according to Sumerian cuneiform texts found on the island. As part of Dilmun, Failaka became a hub for the civilization from the end of the 3rd to the middle of the 1st millennium BC. Failaka was settled following 2000 BC after a drop in sea level.