A planet in the Moab sector settled by a colony that sought to build a perfect society through genetic engineering.
Moab IV is home to a human colony founded about two hundred years before the Enterprise's arrival. Its founders engineered every person for a specific role and sheltered the colony inside a protective biosphere, cutting it off from the outside galaxy.
In The Masterpiece Society, a fragment of a disintegrated neutron star threatens Moab IV. The Enterprise deflects it with help from the colony scientist Hannah Bates, but contact with outsiders persuades several colonists to leave, disturbing the balance their society was built on.