Even the monsters aren't as diverse leading to fights with mostly the same creatures for the majority of the game. (gearnuke.com)
They also tend to decrease the build - up of frustrations that will otherwise lead to fights in the future. (bettertherapy.com)
But now this same team reports there's another — and darker — reason: Older females enter menopause because their eldest daughters begin having calves, leading to fights over resources. (sciencemag.org)