Christ almighty I wish we could have threads not full of stupid here. The topic of this particular thread is fascinating, not to mention incredibly important to the future of medicine and we get to wade through three pages of incredibly stupid shit on eugenics because someone can't help but derailing the thread with derp. Here's a fucking clue, every technological advance humanity makes that materially improves living conditions contributes to making the species weaker in the way described.
Agriculture made it so we didn't need to be as good at going for long stretches without food, house building reduced our need to survive exposure to the elements, tool building reduced our need for physical strength, and so on down the list. Somehow, I would put our civilization today up against one that preceded it and consider ours favorably. Why? Because humans don't just evolve biologically, we evolve technologically. We figured out thousands of years ago we have less need to adapt to ecological niches when we can adapt the ecology to suite us. We advanced to the point where resistance to high heat isn't as important to us because we have AC.
This idea that we need a stronger breed of humans relies upon at its core this idea that man should be considered in a vacuum, independent of the niche he inhabits and the ability to utilize it. Can the man survive disease as well, the cold as well, periods of low food, etc. This standard is ridiculous. Would you hold it against the eagle it does very poorly at the bottom of the ocean? That the abilities it holds are ill suited to a living situation in which it does not exist? Of course not. So why would you then argue that humans in the future would be poorly suited to living in a world without cures for cancer when we've the ability to remove cancer, or will given sufficient development of this technology?
The idea that humans should be suited to survival without all the crap we've come up with to keep us alive is wrong headed. What makes us human is that when nature hands us lemons we say, "fuck that shit, I wanted steak", and then we go to the store we built and buy some goddamned steak. We don't exist apart from what we make and you shouldn't expect us to, nor should you expect that we should conduct our social and medical planning with the expectation we will.
*Deep breath*
Anyhow.
Phage therapy and virotherapy are probably the most important and major breakthroughs to come down the medical pipeline since penicillin and carry with them more potential than damn near anything even under consideration as a possible future treatment. Being able to design microorganisms to do your bidding in the human body isn't only useful for things like cancer but is probably our best hope against antibiotic resistant bacteria which are likely to pose an enormous risk in the near future. More than that is can work as something of a human engineered immune system if done correctly, a virus that waits in your body in a dormant state until the presence of certain microorganisms, or microorganisms in certain places, trigger them to come out an attack like a vaccine, only much more efficient and powerful. Our body plays host to a myriad of microorganisms vital to things like digestion and chasing off other microbes, why not design our own?
The utility is virtually endless. Destroying bacteria. Destroying cancer. Promoting the production of clotting factors in hemophiliacs. Bolstering antibody production. Destroying parasites. Bolstering the human healing factor. Break up clots. Clearing cholesterol and body fat. Promoting muscle growth. The controlled introduction of designer microorganisms, if properly and thoroughly developed, would enable us to modify the human body with a level of precision and effect simply not achievable with surgery, chemical, and radiation treatments.
I get why this idea makes some people squeamish but when you consider how many bacteria and viruses humans play host to at any given moment, it makes it hard to worry that one more is going to be the super plague, especially when we can engineer it not to be. Sure, it could mutate, but so could any of the other millions. Of course we absolutely need to be certain we know what we are going, obviously, but is that not also true of chemical treatments?
I recognize this technology is not ready for the mainstream. It doesn't have a single approved application in the western world of which I am aware. However, that doesn't change what we could do with this if we explore it to the furthest extent. Like all technology it will take time and effort and careful research to bring it to its full potential, but what a potential.