The Green Leaf Alliance, a very peculiar Fourth-level Commercial Alliance, although its technological strength is not particularly strong, is protected by the previous governance of the Milky Way, the Amoeba Faction!
The Amoeba Faction is even willing to endorse this alliance's credit.
The main reason is that the members of the Green Leaf Alliance are all extremely rare producers!
Only wise species evolved from producers can join this Green Leaf Alliance. Simply put, all the wise beings in this alliance are plants, providing food to the vast number of consumers.
The emergence of wisdom among producers and their development into civilizations with cultural legacies is definitely a rare event of a galaxy level. So far, in the entire Milky Way's history of over ten billion years, only three plant-based civilizations have emerged.
