Ghouls or Necrotic Post-Humans, are decrepit, rotting, zombie-like mutants. They are recipients of intensive, elongated radiation sickness which decays their skin, as well as their ligaments. Paradoxically, they also have greatly extended overall lifespans and are, allegedly, immune to, and even brought back to health by the hazards of background radiation and/or nuclear fallout. There are two types: Feral ghouls and Intelligent ghouls. The difference between them is noticeable as the former are just mindless zombies and the latter are as behave just like a human however because of the animalistic behavior and savage threat feral ghouls pose, many people view all ghouls negatively. It is believe that all ghouls eventually become feral just at different rates as they loss their minds and sanity. Exposure to radiation speeds up this process.