I have a world where populated by simultaneous hermaphrodites. Which are like human women plus male reproductive organs, penis and testicles. They could father children like human males, and bear children like human female. Their bearing fertility drops in the 30s and they enter menopause as human female.
Technology is at a early iron age level. Society is tribal in nature. Most hermaphrodites marry and raise children as couples. In some couples both partners bear and sire children. In others more attractive (richer, higher in status) partner sires while less attractive (poorer, lower in status) bears children. Lowest members usually don't have partners, and raise their children from extra-maritial wiring. Few elites have several wives.
Testosterone has similar effect as in humans but less pronounced: more muscle mass, more aggression, more body hair, potential for balding, reduced ability to bear.
Hermaphrodites with small chances to sire children (unattractive, poor, low status) sometimes undergo castration. Everything else being the same castrated hermaphrodites are considered more attractive as wives due to more pronounced feminine characteristics. Criminals are often castrated against their will, especially the violent ones to make them less aggressive.
Does it make sense to have inter-tribal warfare under above circumstances?
On one hand hermaphrodite tribes who conquer other tribes could increase their fitness by killing the older enemies and taking the younger members as their wives. On the other hand why should any member make a risk, since they could reproduce anyway.