Well, no life form has achieved what Bostrom calls a decisive strategic advantage. Instead, they live their separate lives in various environmental niches.

Ants are probably good example how could organisational intelligence (?) be advantage.

According to wiki ''Ants thrive in most ecosystems and may form 15–25% of the terrestrial animal biomass.''. See also google answer, wiki table or stackexchange.

Although we have to think careful - apex predators does not use to form large biomass. So it could be more complicated to define success of life form.

Problem of humanity is not only global replacer - something which erase all other lifeforms. It could be enough to replace us in our niche. Something which globally (from life viewpoint ) means nothing.

And we dont need to be totally erased to meet huge disaster. Decline population to several milions or tousands... (pets or AI) ... is also unwanted.

We are afraid not decisive strategic advance over ants but over humans.