Fortmass is a habitable planet. Its inhabitants are either peaceful workers or rude bandits, the latter of which are less abundant, but stronger physically.
Fortmass was always a peaceful planet, however some inhabitants and non-sapient beings still cause small amounts of chaos. This includes Fortean bandits and Fortmass Slazers.
Fortmass is a play on force and mass, two fundamental units of physics, just like inertia.