Dark forest state and the cosmic speed limit (spoilers for all books)
In the canon of the Three-Body Problem book series (excluding the fanfiction and including the prequel), the fact that no mass can be transported faster than the speed of light is one of the things necessary for the dark forest theory to work in-universe, correct? Chains of suspicion wouldn't exist without the lightspeed limit... or would they? (queue vsause music lol) Would the vast differences between the cultures of distant civilizations be effective in creating long-enough chains of suspicion in order to create the dark forest state? Would different environments in different parts of the cosmos create different-enough cultures? Would the dark forest state realistically exist in a world like the Xeelee Sequence, where the different forms of life are so vastly different from each other (e.g. civilizations of dark matter, civilizations inside stars, civilizations made of logic trees or something, etc.)? Would the exponential growth of civilization simply inherently target other civilizations as enemies?
Obviously within canon the lightspeed limit is an extremely important factor for multiple different mechanisms and plot points. E.g. the cosmic horror of the universe being a paraplegic, and that the low value of the speed limit being a direct effect of many wars in the past. But I'm asking for the sake of exploration into the dark forest theory, as well as potentially to help any future worldbuilding projects that want to deal with dark forest-adjacent ideas in a cosmos without the speed limit.
Basically what I'd like to hear different thoughts on is this: If every mechanism in 3bp canon remains the same with exception that technology can enable FTL travel, would the dark forest state still exist?
Deep thinking and long and detailed discussions are welcome.
(This exact question hasn't been posed and/or discussed about before on this sub, right?)