Interstate Wars Hit Post-War Peak as Global Conflict Deaths Surge

The year 2025 has set a grim benchmark for global instability, recording the highest number of armed conflicts between sovereign states since the end of the Second World War. According to data compiled by the Uppsala Conflict Data Program (UCDP) at Sweden’s Uppsala University and a parallel study by the Peace Research Institute Oslo (PRIO) in Norway, eight interstate wars raged across the world last year, double the figure for 2024 and a level not seen in eight decades. The total human cost was staggering: almost 245,000 people lost their lives in organised violence, making 2025 the second deadliest year since the Rwandan genocide of 1994, or the third deadliest since the Cold War, depending on the metric used.

The war in Ukraine remained the single largest driver of mortality, accounting for 94,700 deaths, according to UCDP. But the bloodshed was geographically dispersed. The PRIO report, titled “Conflict Trends”, documented 65 distinct conflicts in which at least one government was a party — the highest count since data collection began in 1946. Beyond the full-scale Russian invasion and Israel’s military operations in Syria, the list of interstate clashes included border hostilities between India and Pakistan, Afghanistan and Pakistan, and Cambodia and Thailand, as well as direct exchanges between Iran and Israel. Viewed from New Delhi, Islamabad or Phnom Penh, the data confirm that long-simmering territorial disputes are once again being settled with artillery rather than diplomacy.

Researchers expressed alarm not only at the quantity of wars but at their changing character. Siri Aas Rustad, a PRIO researcher who presented the findings, described the numbers as “shocking” and noted that she usually manages to find a positive trend. “Unfortunately, there is not much positive I can extract from this,” she said. Both institutes highlighted a sharp rise in deliberate attacks against civilians, a pattern that humanitarian officials in Geneva say is eroding the norms of distinction and proportionality that have underpinned the laws of armed conflict for generations.

The doubling of interstate conflicts for the second consecutive year suggests a structural shift, not a temporary spike. Analysts in London and Washington point to the erosion of Cold War-era guardrails, the fragmentation of multilateral diplomacy, and the emboldening of revisionist powers. The PRIO report warns that the world is settling into a “new era of high violence” with no immediate prospect of reversal. As the data from Scandinavia’s conflict monitors make clear, the post-1945 order, designed precisely to prevent wars between states, is now facing its most severe test.