Um, I hate to burst bubbles but Manticore finds out about the nexus relatively quickly, it should be either the next book or the following one. In fact, based on what we know, it should have in call to vengeance, but then the Andies were added.
They then examine it and discover that it is well beyond their abilities to actually survey, maybe beyond anyone's capabilities at the time. They then spend decades arguing over whether to survey, opposing factions argue that the estimated price, which may have been decreasing over time, is too high or that pandora's box should not openned.
Weird Harold wrote:Bluestrike2 wrote:Aside from being a binary system with three habitable planets, Manticore is pretty much a run-of-the-mill frontier star nation that's not located anywhere special. Its population is better educated, and their tech base is better than most, but that's likely not their enemy's rational.
Manticore does have the distinction of having a biome close enough to Earth's that it developed a plague that could attack humans. I don't know if that's enough to lead speculation down a rabbit hole in the search for a motive.
