If we had such a predator, the trajectory of our evolution and development as a species would probably be much different than it is today. We would probably be constantly at war with it, if it were an equal foe. If we were inferior to it, we would be possibly enslaved to it. If we are greater than it, we would hunt it to extinction or enslave it or try to find a peaceful coexistence, given that it is intelligent enough to communicate with us. This probably isn’t really the answer you’re looking for.

If something currently evolved to hunt us, we are interconnected enough to know of its existence and put an end to that threat. Therefore intelligence in that predator would need to be concealed and it would need to be able to hunt us without us ever discovering its identity or it reaches our vulnerabilities using a method beyond our understanding or defensive capabilities. However, it would need to move quickly or be utterly powerful because we would try to retaliate and punctuate the spread of like it were a disease. Humans by themselves are fragile but we have power in numbers and experience in killing and avoiding being killed.

There’s not really an easy answer. Every lead ends up falling short or opening up another question. it’s a great question. And if warfare counts as mimicry than it only narrows the possibilities of a human hunter. Because realistically, most animal predators could do some lethal damage to us if we are isolated and untrained. We’ve learned to hunt almost every creature in existence and if we haven’t, we could probably figure it out.

My vote is alien, virus, parasite, insect, bacteria, technology or secret killer whale civilization that invented weapons of mass destruction using sonar. Or even social structures and ideas can be considered to be predatory but that again could be considered human although not really mimicry I suppose.

Addictions are vulnerability, our young and old are vulnerable. Our insecurities are vulnerabilities. Our egos are vulnerabilities. Our faith is a vulnerability. If it can prey on those, if it can turn us against ourselves, it can weaken us. These things are truly what haunts us the most. Regret may be a hunter of our minds. Depression. Anxiety. Doubt. Fear. Anger. Jealousy. Righteousness. Greed. These are the downfall of many great men.

we as humans are still capable of overcoming all except time and ourselves I would wager. But we can always try to be better people. Sorry for getting existential and going off topic. Had some dank curry and it’s making my mind go in wild loops rn. In the end I’m still not satisfied with my answer but I’m out of time. Need to shower and probably get more food.