Among the signs the Prophet Muhammad (PBUH) foretold before the Last Hour is a disturbing one: killing would become widespread. This is not presented in Islam as a cause for excitement or triumph, but as a sober warning about what happens when human beings lose moral restraint, sacred law is ignored, and life becomes cheap.
For a thoughtful reader, the force of this prophecy is not merely that "people will kill people" - that has always happened. Rather, the hadith describe a recognisable increase in chaotic bloodshed, including killing so senseless that even the killer may not fully understand why he killed. That is a striking description of many features of modern mass violence.
The prophecy in the words of the Prophet
The Arabic word used in several narrations is al-harj. The Companions asked what it meant, and the Prophet (PBUH) explained it plainly: killing.
The Messenger of Allah (PBUH) said: "The Hour will not be established until al-harj increases." They said: "What is al-harj, O Messenger of Allah?" He said: "Killing, killing."
Hadith grading: Sahih. Reported in Sahih al-Bukhari and Sahih Muslim from Abu Hurayrah.
Another authentic narration gives an even more chilling description:
The Messenger of Allah (PBUH) said: "By the One in Whose Hand is my soul, the world will not pass away until a time comes upon people when the killer will not know why he killed, and the one killed will not know why he was killed." It was said: "How will that be?" He said: "Al-harj. The killer and the killed will be in the Fire."
Hadith grading: Sahih. Reported in Sahih Muslim.
This second narration is especially important. It does not only mention a quantity of killing; it describes a moral and psychological collapse. Killing becomes confused, impulsive, ideological, tribal, bureaucratic, or indiscriminate. People may kill because they were ordered to, because a group identity demanded it, because propaganda dehumanised the victim, because of a moment of rage, or because violence has become normalised.
What the prophecy does and does not claim
An honest reading requires precision. The Prophet (PBUH) did not say that every generation would be more violent than the one before it in a simple straight line. Nor did he say that there had never been large-scale killing before Islam. Human history before and after the Prophet (PBUH) includes wars, massacres, tribal raids, imperial conquests, and civil strife.
The prophecy is broader and more realistic: before the Hour, al-harj would increase and become widespread. In Islamic theology, signs of the Hour can appear, recur, intensify, and then reach a fuller form closer to the end. Some signs are not single-day events; they are patterns that become increasingly visible in human society.
This matters because some popular presentations of prophecy overstate the case by implying, "There was no widespread killing before, and now there is." That is not accurate. A stronger and more faithful argument is this: the authentic hadith identify mass killing and senseless bloodshed as a major feature of the age before the Hour, and this feature is now unmistakably present on a scale, speed, and technological capacity that earlier societies could scarcely have imagined.
Why this is striking in the modern world
The modern world has produced extraordinary medical, educational, and technological progress. Yet alongside that progress, it has also produced unprecedented tools for killing. A person in the seventh century could kill with a blade, spear, arrow, or poison. Modern human beings can kill with machine guns, artillery, aerial bombardment, chemical weapons, nuclear weapons, drones, mines, missiles, and industrial systems of imprisonment and extermination.
The twentieth century alone saw two world wars, the Holocaust, nuclear bombings, genocides, mass deportations, ideological purges, colonial violence, civil wars, and countless regional conflicts. The twenty-first century has continued to witness invasions, sectarian wars, ethnic cleansing, terrorist attacks, gang killings, school shootings, drone strikes, and conflicts in which civilians are often the majority of the dead or displaced.
One does not need to claim that the modern era is the most violent by every possible statistical measure. Scholars debate whether violence has declined per capita in certain categories compared with some earlier periods. That debate should be acknowledged. But even if one accepts that some rates of violence have fallen in some places, the hadith still speaks powerfully to the reality of widespread killing as a defining global phenomenon before the Hour.
The world today can watch massacres in real time. A war in one country can be financed, armed, justified, and broadcast across continents. A single leader's decision can kill thousands. A single weapon can destroy a city. A single ideology can persuade ordinary people to murder neighbours. This is not merely ordinary crime; it is harj - killing amid confusion, turmoil, and moral collapse.
"The killer will not know why he killed"
This phrase deserves careful reflection. It does not necessarily mean that the killer has no immediate explanation at all. He may say, "I was following orders," "They were the enemy," "Everyone was doing it," "My group told me," or "I was angry." But beneath those slogans, the act may be morally senseless. He cannot give a justification before God.
Modern mass killing often works precisely this way. Bureaucracies divide responsibility so that no one feels fully accountable. Soldiers may kill people they have never met. Militias may murder civilians because of ethnicity or sect. Terrorists may kill strangers in the name of a cause. Criminal gangs may kill over status, territory, or revenge. Digital propaganda can turn a human being into an abstraction, making it easier to destroy him.
The victim too may not know why he was killed. A person may die because he lived in the wrong village, belonged to the wrong ethnicity, was present in the wrong marketplace, sat in the wrong classroom, drove on the wrong road, or happened to be under the wrong bomb. This is exactly the kind of terrifying disorder the hadith describes.
The strongest counter-argument
A sceptic may object: "Predicting killing before the end of the world is too easy. Every society has killing. This is not a miracle."
This is a fair objection if the claim is made carelessly. A vague statement such as "there will be violence" would not be very impressive. But the hadith are more specific than that. They identify killing as a widespread sign linked to social turmoil, and one narration describes a time when the moral reason for killing becomes so obscured that killer and victim are caught in senseless bloodshed.
Still, this prophecy should not be treated as a stand-alone proof that forces belief upon every reader. Islamic evidences are cumulative: the Quran's preservation, its theological clarity, the Prophet's character, fulfilled prophecies, the transformation of Arabia, the law's moral depth, and the lived spiritual reality of Islam all support one another. This hadith is one strand in that larger rope.
Another objection is that some ancient societies had extremely high levels of violence. That is true in some cases. Islam does not deny it. The point is not that no previous age was bloody. The point is that the Prophet (PBUH), in a pre-modern desert society, identified widespread killing and chaotic bloodshed as a major feature of the final age - and the modern world has made that sign globally visible with frightening clarity.
The Islamic moral warning
Islam does not mention this sign so believers can look at suffering from a distance and say, "Prophecy fulfilled." The Quran treats human life as sacred:
"Whoever kills a soul unless for a soul or for corruption in the land - it is as if he had slain mankind entirely. And whoever saves one - it is as if he had saved mankind entirely."
The sign is meant to awaken conscience. If killing becomes widespread before the Hour, the believer's response is not fascination with doom, but repentance, restraint, justice, and protection of innocent life. The Prophet (PBUH) warned against participating in blind conflict, against shedding unlawful blood, and against being swept away by tribalisms and rage.
This is also why the hadith says, "The killer and the killed will be in the Fire" in the context of harj. Scholars explain that this refers to cases where both parties are wrongfully engaged in fighting and each intends to kill the other. It does not mean that every murdered victim is sinful. Islam is precise: the innocent victim is not blamed for being killed unjustly.
A sign that should humble us
The prophecy of widespread killing before the Hour is painfully relevant. It does not require exaggeration, manipulated statistics, or sensationalism. The authentic words of the Prophet Muhammad (PBUH) are enough: a time would come when killing would increase, and bloodshed would become so confused that people would scarcely know why they killed or why they were killed.
For the sceptical reader, this is worth serious thought. For the believer, it is a call to fear Allah, value human life, avoid blind conflict, and refuse to be a tool of injustice.
The world has become astonishingly advanced, yet also astonishingly capable of slaughter. Fourteen centuries ago, the Prophet (PBUH) told us that this would be one of the signs before the Hour. We are living in a time when that warning is no longer abstract; it is visible on the news, in the ruins of cities, and in the grief of families across the earth.