Author Note: I'm sorry, today I had to visit my grandmother's family so I don't have sufficient time to edit the chapter yet. I'll fix it asap.
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What kind of secret was it that had the possibility of destroying the entire Federation?
The book writes that there was a fatal loophole in the Nine Gods system at the beginning of its establishment. In order to fill this loophole, Marshal Baldwin and Feynman spent their entire lives searching for a certain item. If they could get this item, they could fix the loopholes in the Nine Gods system. But they didn't find it, and Feynman entrusted the matter to Eric. Perhaps Baldwin had told Eric himself, but this matter was too secret and too important, to be safe, they would probably only inform Eric about it before dying.