We can trace in the historical developments leading up to the existing modern world a gradual shrinking back from the visceral aspects of warfare. It was only a couple of centuries ago within the much longer arc of human social and cultural development that people were doing to each other things - as a matter of regular violent relation - that most in the developed world would consider to be deranged and criminal, even in a context of warfare.
Of course it is worth emphasizing that we have to be careful with language here. Much of this profound change can largely be attributed to the developments of the richer industrial core, and that outside that core - and even within the poorer less-developed industrial powers - still exists a multitude of differing pre-industrial relations, or else those relations are creeping back in to weakening powers.
Nevertheless for even the great powers existing a few centuries ago, much of the violence in warfare and civil administration was done by hand and up close and personal. There is no getting around cutting at or stabbing at someone with a sword or lance; one has no choice but to survey much of that damage: the look of it and the sound of it and the smell of it especially.
There were still the matter of missile weapons of course, and firearms themselves have been under development for a considerable amount of time, but the qualitative changes seemed to really start cropping up with the dawning of the industrial era as the range and destructive power of these weapons really started to open up distances and the meaning of violence itself, abstracting it away from the local act and extending its consequences to the aftermath in the form of the dead and wounded, after the fact.
We can see too that the concurrent developments of communication technologies such as the printing press and then later telegraphs and radios and phones would further increase the distances and change the evolutionary movements of represented experiences, communications, and ideas coming out of warzones, and public relations would emerge as a fully developed industry turned towards shaping and managing those ideas and communications.
Sifting through the historical record and cataloguing and making sense of these changes is a lifetime of work all in itself, but for now we could say there has been a discernable change in the way warfare and violence and cruelty in general are perceived and understood and carried out. One need only look back to the Bronze Age and Classical antiquity and into the Middle Ages and see that violent conflict was carried out very differently.
The Assyrians for example would find the PR efforts of modern nations tidying up their atrocities and war crimes quite strange, what with their fanciful murals depicting the king and state carrying out terrible acts upon their enemies, so as to remind their foes the consequences of resistance. And great powers like the ancient Greeks and Romans would regularly announce themselves outside of the city walls, either offering a deal and mercy or not, depending on the siege, and then when the siege actually began, everyone within the walls of that city would understand the implications of the fall of those walls.
Similar circumstances could be found throughout the Middle Ages. The Mongols for example were feared throughout Asia for their willingness to raze whole towns, butchering whole populations by hand in single days and leaving fields of bone in their wake, and even violently disciplining their own ranks, and it was right up to the birth of modern nations and the industrial era that city states were still violently and publicly executing perceived criminals and enemies of state and putting their horrific tortures and remains on full public display to detract dissenters.
These conditions were by no means evenly distributed, with a whole spectrum of harshness and severity among the powers. For example, the Achaemenid Persians were known for being much more lenient and exercising softer power, though they would go hard when they needed to as well. Further, there is also the matter of class and privilege and the location of those various classes in the division of labor, which implied their respective distances from hard labor and violent conflict. Though there were even exceptions here, as there were upper level classes that regularly fought such as in Rome.
Nevertheless, we see definite changes in the application of violence and state power, as well as the perception and understanding of that violence, leading up to and then transitioning into the modern era, some of which we have sketched out in previous posts. The mass sensibility toward violent conflict has changed so broadly that we now see a broad and concerted effort among major and minor powers at minimizing the violent intentions of a conflict, and then attempts at managing circulating reports of atrocity and war crime as those things inevitably crop up when a conflict drags on.
A far cry from emphasizing these things for applications of terror and intimidation, though of course we see this tendency more pronounced in the weaker and poorer powers, who can't afford the more precise implements, PR armies, and total control of the battlefield, such as an insurgency force.
Even on the individual level, military psychologists have reported that soldiers in developed modern states are more reluctant to use implements of hand to hand combat, and we have that well-known phenomenon of "shooting over the enemy's head," which is a little tougher to do when one is hacking away with a sword.
Much could be said about these changes, and the resolution could constantly be increased and all sorts of exceptions picked out, with violence waxing and waning and concentrating in some powers and cultures and not others, but tracing the general trajectory of human conflict, we begin to see a relationship in which the exploding material power of the industrial nations engenders a wariness and caution around violent and kinetic combat as we surveyed in the course of the World Wars, in which there is an arms race for developing new technologies and doctrines for enabling the powers to get at each other and gain leverage over each other while truncating the duration and the destruction of the conflict. We see surgical strikes and special ops, and the push and pull of insurgency and counter insurgency capabilities, evolving in new ways.
As nations rapidly industrialized and globalized and wealth spread, greater swathes of world populations would begin to experience greater subjective distances to the application of violence. To be sure, a less violent world is desirable, but this is not a sanguine regurgitation of the Pinker-esque contention that we are becoming less violent in general.
As we observed, our increasingly abstract and distant relation to violence is partially a function of relative wealth and privilege, and even among the modern rich nations, protracted and tortured conflicts tend to churn out more and more atrocities as human nature under chronic strain gets nastier.
Further, the logic of empires has not gone away, and empires still want what they want, regardless of ideal or abstract codes of conduct. Soft and economic power is still violence in a different form, and there is no consolation in slowly getting suffocated to death as opposed to instantly crushed.
More generally and in the longer term, that distance and abstraction of violent conflict can be attributable to economic expansion and prosperity. Contraction and the ensuing conflict tends to close those distances and reduce those abstractions once again, and as the conflict grinds on and heats up, those intentions and PR efforts begin to buckle as the atrocities crop up.
In this era of contraction, it is apparent that we still have a lot more contracting to do, and things will get much worse, surveying the line of crises coming down the pipe. It is very difficult to say for certain what will happen or what is even possible.