I first realized Endless Space 2 would be a game I'd enjoy upon discovering that one of its main factions is a race of treants called the Unfallen. They approach the grand 4X strategy adventure of exploring, expanding, exploiting, and exterminating by spreading peace and harmony throughout the galaxy. It's essentially the March of the Ents on a galactic scale, complete with featherweight philosophical talk in quest popups about fire being a force that both creates and destroys.