The world is undoubtedly in a state of unrest as shown by the plethora of international conflicts scattered throughout the globe. Such turmoil leaves many wondering if nuclear devastation will become a reality. With geopolitical tensions augmenting seemingly by the day, the threat of global catastrophe looms large in the public eye. To understand the severity of this danger, it is essential to understand the status of nuclear weapon existence around the world.
Firstly, what even is a nuclear weapon? To no one’s surprise, nuclear bombs are explosive devices of mass destruction. They derive their incredible power from nuclear reactions, occurring either through nuclear fission, when the nucleus of an atom is split, or through nuclear fusion, when two atoms are joined together. A combination of fission and fusion can also be used. Atomic bombs are a result of nuclear fission, while the newer, more powerful thermonuclear bombs (commonly known as hydrogen bombs), said to be thousands of times more powerful than their atomic predecessors, are formed through the nuclear fusion process. Hydrogen bombs have never been used in combat before, leaving the true boundaries of their unfathomable destructive capabilities somewhat unclear. When dropped, the heart of a nuclear explosion reaches temperatures of several million degrees centigrade, quite literally vaporising all human tissue in a wide area. In addition, these bombs create extreme levels of radiation, causing sickness or even death. Even those underground who survive the initial heat flash would perish due to oxygen being sucked out of the atmosphere.
Today, 9 countries possess nuclear arsenals, a relatively low number considering the much larger figure of nearly 200 nations on Earth. Aside from being extremely hard to research and produce, the Non-Proliferation Treaty (NPT) serves as a centerpiece in preventing the spread of nuclear bombs. Signed by 191 state parties, the treaty promotes peaceful uses of nuclear energy, while also prohibiting the acquisition or production of such weapons. Today, the NPT formally recognizes 5 countries as nuclear-weapon states, characterized by having produced and tested a nuclear weapon before 1967, and the remainder as non-nuclear-weapon states. Non-nuclear-weapon states pledge themselves to never acquire nor produce such weapons, while nuclear-weapon states in exchange agree to share the benefits of peaceful nuclear technology and aim for nuclear disarmament. There are 5 nuclear weapon states, but why do 9 countries have nukes? As it turns out, some nuclear-possessing nations do not abide by the NPT and thus possess the bombs outside of this treaty structure. Now, who even are these 9 nations, which do not confine themselves to the NPT, and what destructive power do they have?
The United States of America
No shocker here. America currently has the second-highest number of nuclear weapons in the world, having ~5,177 nuclear warheads according to an early 2025 estimate. The US was the first nation to create them and the only nation in history to use nuclear weapons in war, both of its 2 ever attacks being on Japan.
Russia
Once again, we have another unsurprising name. Russia maintains the largest nuclear arsenal in the world. The Federation of American Scientists estimate 5,459 nuclear warheads to be in possession of Russia. The nation is prominently known for its nuclear arms race with the United States during the Cold War.
China
China has had a nuclear arsenal since 1964, rapidly advancing their capabilities since then. Recently, US intelligence agencies have begun to believe that China is developing a brand new generation of nuclear weapons, and the US assessment on their intention to radically advance their nuclear weapons is an intense debate in the intelligence community. Figures from 2025 place China’s arsenal at ~600 nuclear warheads.
The United Kingdom
Since 1952, the UK has had nuclear capabilities, the third in the world to do so. It has ~225 nuclear warheads and is the only nuclear weapon state to reduce to a single deterrent system. The United Kingdom currently has 4 ballistic missile submarines, maintaining continuous deployment of nuclear weapons at sea since 1969.
France
Estimates place the French nuclear stockpile to have ~290 warheads. In 1960, they became the fourth nuclear-armed state. Since the end of the Cold War, France’s stockpile has been drastically reduced from the approximate high of 540. Today, France is the only remaining nuclear-weapon state in the European Union after the UK’s withdrawal.
India
Unlike the previous 5, India is a non-NPT nuclear weapon possessor, refusing to sign the NPT in 1968. India began nuclear development in the 1970s, testing its first nuclear bomb in 1974, as a nuclear deterrent in fear of a second war with China and a fourth war with Pakistan. Popular statistics state an estimated 180 nuclear warheads are present within India’s arsenal.
Pakistan
Like India, Pakistan did not sign the Non-Proliferation Treaty. Following India’s first nuclear test, Pakistan began its nuclear program and officially became a nuclear power in 1998. Pakistan has aided North Korea, Libya, and Iran in their nuclear programs, facing much scrutiny from the US. Disputes with India continue to serve as a key reason for maintaining a nuclear arsenal, currently situated at ~170 warheads.
North Korea
Once having joined the NPT, North Korea became the only nation to withdraw from the treaty in 2003. Of the 9 nations, North Korea has the smallest nuclear arsenal with an estimated 50 warheads. Its first nuclear test commenced in 2006.
Israel
Like the previous 3 nations, Israel has not signed the Non-Proliferation Treaty. Interestingly, Israel has not officially confirmed nor denied its possession of nuclear weapons, but it is widely accepted by international experts that they do. It is estimated that Israel has approximately 90 nuclear warheads, making them the nation with the second-smallest arsenal, among the 9.
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