There is an ant species, the Argentine ant. It is rather harmless in its own habitat.

But as an invasive species, it builds super-colonies. All ant colonies in a super colony are similar genetically and don’t fight among each other, seeing all the colonies in their new territory as their own. They quickly outcompete and directly annihilate the domestic ant species everywhere their set their tiny feet on. These guys are not just a collective intelligence, they are a collective super-intelligence. The ant of all ants.

Now ants are not a real hivemind. Each ant is an individual behaving due to chemical cues, instincts and learned patterns. But they behave like a hivemind due to sibling altruism.

We don’t need a real Borg Hivemind. We just need to start behaving like one. Maybe AI can help with that. And then we can start populating the galaxy.