One common element of military science fiction is the powered exoskeleton, also known as an exoframe, exosuit or powered armor. The basic exoskeleton is a powered framework that serves to provide the wearer with enhanced strength. In movies such as Edge of Tomorrow and video games such as Call of Duty Advanced Warfare the exoskeletons provide improved mobility and carrying capacity (which can include the ability to carry heavier weapons) but do not provide much in the way of armor. In contrast, the powered armor of science fiction provides the benefits of an exoskeleton while also providing a degree of protection. The powered armor of Starship Troopers, The Forever War, Armor and Iron Man all serve as classic examples of this sort of gear.
Because the exoskeletons of fiction provide soldiers with enhanced strength, mobility and carrying capacity, it is no surprise that militaries are very interested in exoskeletons in the real world. While exoskeletons have yet to be deployed, there are some ethical concerns about the augmentation of soldiers.
On the face of it, the use of exoskeletons in warfare seems to be morally unproblematic. The main reason is that an exoskeleton is analogous to any other vehicle, with the exception that it is worn rather than driven. A normal car provides the driver with enhanced mobility and carrying capacity and this is presumably not immoral. In terms of the military context, the exoskeleton would be comparable to a Humvee or a tank, both of which seem morally unproblematic as well.
It might be objected that the use of exoskeletons would give wealthier nations an unfair advantage in war. The easy and obvious response to this is that, unlike in sports and games, gaining an “unfair” advantage in war is not immoral. After all, there is not a moral expectation that combatants will engage in a fair fight rather than making use of advantages in such things as technology and numbers.
It might be objected that the advantage provided by exoskeletons would encourage countries that had them to engage in aggressions that they would not otherwise engage in. The easy reply to this is that despite the hype of video games and movies, any exoskeleton available in the near future would most likely not provide a truly spectacular advantage to infantry. This advantage would, presumably, be on par with existing advantages such as those the United States enjoys over almost everyone else in the world. As such, the use of exoskeletons would not seem morally problematic in this regard.
One point of possible concern is what might be called the “Iron Man Syndrome” (to totally make something up). The idea is that soldiers equipped with exoskeletons might become overconfident (seeing themselves as being like the superhero Iron Man) and thus put themselves and others at risk. After all, unless there are some amazing advances in armor technology that are unmatched by weapon technology, soldiers in powered armor will still be vulnerable to weapons capable of taking on light vehicle armor (which exist in abundance). However, this could be easily addressed by training. And experience.
A second point of possible concern is what could be called the “ogre complex” (also totally made up). An exoskeleton that dramatically boosts a soldier’s strength might encourage some people to act as bullies and abuse civilians or prisoners. While this might be a legitimate concern, it can easily addressed by proper training and discipline.
There are, of course, the usual peripheral issues associated with new weapons technology that could have moral relevance. For example, it is easy to imagine a nation wastefully spending money on exoskeletons, perhaps due to corruption. However, such matters are not specific to exoskeletons and would not be moral problems for the technology as such.
Given the above, it would seem that augmenting soldiers with exoskeletons poses no new moral concerns and is morally comparable to providing soldiers with Humvees, tanks and planes.