Global tensions are escalating amid a complex web of conflicts and shifting power dynamics, raising concerns among political and military leaders about the increasing risk of a large-scale war. Current instability is driven in part by the actions of nuclear-armed states led by nationalist leaders who challenge the established international order, experts say.

The world in 2024 has seen 61 active conflicts, including 11 full-scale wars, according to recent analyses. Notable among these are ongoing hostilities in Gaza, the protracted civil war in Sudan—which by mid-2025 had resulted in approximately 150,000 battlefield deaths—and the largest land war in Europe since World War II taking place in Ukraine. The Middle East remains volatile with Iran at the center of significant disruptions. Additional flashpoints include enduring rivalries between India and Pakistan, North and South Korea, and notably the Taiwan Strait.

Taiwan represents a particularly acute risk, given its potential to trigger direct conflict between China and the United States. For decades, U.S. naval dominance has provided a security guarantee to the island, but China has expanded its military capabilities to the point where it now fields a larger fleet than the U.S. Despite this, Chinese President Xi Jinping is understood to be cautious about provoking a conflict that could result in heavy casualties should the U.S. actively intervene. Recent statements by former President Donald Trump expressing ambivalence about defending Taiwan, including his remark that the U.S. does not need “a war that’s 9,500 miles away,” have introduced further uncertainty regarding U.S. commitment, potentially encouraging Chinese aggression.

The broader root of current insecurity lies in the altered balance of power between China and the United States. After the Cold War, American hegemony helped sustain a semblance of global stability through adherence to international law and multilateral institutions. However, the 2003 U.S. invasion of Iraq and subsequent failures in Iraq and Afghanistan undermined confidence in interventionist policies. The Trump administration further distanced the U.S. from international cooperation, adopting isolationist and protectionist stances that have weakened global institutions like the United Nations, NATO, and the World Trade Organization. Observers have drawn parallels between these developments and the interwar period of the 1930s, when nationalist and protectionist policies contributed to global instability.

Traditional mechanisms designed to maintain peace are increasingly ineffective. The so-called rules-based international order, which once structured diplomacy and conflict resolution, now struggles to function amid renewed great power competition. Efforts to promote peace through spreading democracy and economic interdependence—once symbolized by the idea that economically connected democracies avoid war—have faltered. The number of democracies worldwide has declined steadily since 2006, diminishing the influence of liberal democratic norms on global affairs.

With American global leadership waning, the emerging paradigm resembles a modern “sphere of influence” model, where major powers dominate specific regions: the U.S. in the Americas, China in East Asia, and Russia in Eastern Europe and Central Asia. Under this arrangement, disputes are primarily managed through direct negotiations among authoritarian leaders. However, this model carries risks if these leaders’ relationships sour, and it leaves smaller states vulnerable to domination by their more powerful neighbors.

While acknowledging the increased risks, experts caution that a new world war is not inevitable. Nonetheless, the current geopolitical climate demands serious attention, given the array of ongoing conflicts and fractures in the international system that could escalate rapidly if mismanaged.