I Eat Tomatoes
Ah, I see the power scale is more Swallowed Star than Nine Cauldrons in level - unlike what I first thought. That actually makes me more interested. Also explains why gladiators and fighters are so important to the Earth Alliance. Originally, I thought, by the title's name, that the fighters would also serve as gladiators on a cosmic scale, earning resources and privileges for Earth through their strength. Instead, it seems like they're more straightforward - they're a pure military power that can determine a war's outcome, and the survival of the species.