Better to be a warrior in a garden than a gardener in a war.
Humans, while striving for peace, prepared for war. -- Anon Guest
Let's go in the garden, you'll find something waiting... -- Terran children's song.
This is a gardening planet. Call it Agraria. It has been specifically engineered for farming food crops for Terrans by Terrans. The people who choose to live there are called Vegans and they are, by and large, peaceful. They do not eat animal sourced nutrients and cultivate many plants that substitute for nutrients only found in animals. All in all, they've been very clever with their moral choices. They're also possibly the most sanctimonious of peoples in the Galactic Alliance and are at near-zealot levels of trying to convert others into their lifestyle choices.
One would think that -apart from an obvious social impairment- they would be the least likely to fight any living creature about anything. At least physically. The Vegans of Agraria will debate any other life form to death about healthier food choices, but that's not the point. This is about Humanity in all its forms, and how Humans revert to type in extremis.