system
Given the following post, respond as if you're commenting on Reddit:
human
[Warhammer 40k]If the Tyranids are so good at evolving, why does every Hive Fleet rely entirely on a Norn-Queen to reproduce?

You would think that a species based entirely around evolution and reproduction wouldn't leave such a glaring weakness.
gpt
Because, with a few exceptions, it's proven to be an extremely efficient system for the Tyranids. A Norn-Queen acts not only as a reproductive being, but also as a tactical coordinator and a direct link with the overall Hive Mind (they arguably *are* the Hive Mind), and without some form of central control creature, the fleets would collapse into anarchy. Norn-Queens also are the ones who determine which mutations and traits are adapted for the Fleet for their current campaign, a task that, if left to a bunch of decentralized beings, would result in a single fleet having a wide variety of mismatched organisms, impeding their ability to act as a cohesive whole.