What's the most significant thing you could do as an ant, if you kept your current mind?
Imagine you were reborn as a female queen ant with an expected lifespan of about 15 years (worker ants live about half a queen's timespan), and had the ambition to make the most of your tiny new life. And you got to keep your current intellectual capacity and knowledge.
Depends on whether I also get the knowledge on living as an ant, as a queen, in a colony.
Hardest thing would be predators.
I suppose the best I could do would be to find something to write with, like dirt or ink, and a scrap of paper, and "walk" some words along a page, hopefully notify a good human that I was an intelligent/human ant - and from there I'd be at the mercy of capitalism...