The proliferation of nuclear weapons, whether by state or non-state actors, poses one of the greatest threats to international security and world affairs. A nuclear weapon is an explosive device that derives its destructive power from nuclear reactions. Nuclear weapons are the most damaging weapons ever created. There are two ways to build nuclear weapons: Say no to plagiarism. Get a tailor-made essay on “Why Violent Video Games Should Not Be Banned”? Get an original essay 1.fissile weapons (also called atomic bombs or bombs) and 2.fusion weapons (also called hydrogen bombs, H-bombs or thermonuclear weapons). The way nuclear detonation energy is different in these nuclear manufacturing technologies. Nuclear fission produces the atomic bomb, a weapon of mass destruction that uses the force released by the splitting of atomic nuclei. When a free neutron hits an atomic nucleus of a radioactive material such as uranium or plutonium, it hits two or three other neutrons for free. Nuclear weapons are the power of nuclear energy, nuclear energy used for 2 purposes; one is the civilian objective and the other is the military objective. The use of nuclear energy for civilian purposes is not prohibited. In the 1950s, attention shifted to the peaceful purposes of nuclear fission and its ability to produce electricity. Today, the world produces a lot of electricity from nuclear power, as it did from all sources in the early years of nuclear power. But some countries also use it for military purposes. nations have nuclear weapons to show their military might. “The nine nations that possess nuclear weapons. Only five out of nine countries have legally recognized nuclear weapons. North Korea says it has successfully carried out its first hydrogen bomb test, but other countries have nuclear warheads. Only nine countries in the world have access to nuclear weapons, according to a report by the Stockholm International Peace Research Institute (SIPRI). In total, it is estimated that there are approximately 16,300 nuclear weapons distributed among these nine countries. The United States, Russia, the United Kingdom, France, China, North Korea, India, Pakistan, and Israel all control some nuclear weapons. Russia and the United States share 93 percent of all nuclear warheads, but they have been asked to reduce the number of weapons they have under the New START treaty (Treaty on Measures to Reduce and Limit more strategic offensive armaments).” (http://www.independent.co.uk/news/world/politics/the-nine-countries-that-have-nuclear-weapons-a6798756.html cited January 16, 2018) according to this news, there is There are nine nations that possess nuclear weapons. The main problem with nuclear weapons is the disruption of the balance of power between nations. Essentially, the balance of power is a kind of international order. But theorists differ from the normal operation of the balance of power. Structural realists describe an "automatic version" of the theory since system balance is an automatic, self-regulating, and unintended consequence of countries striving to achieve their own narrow interests. Previous versions of the balance of power were more in line with the "semi-automatic" theoretical formula, requiring a "balancing" state to throw its weight to one side of the scale or the other, depending on which is the lighter, to regulate the balance of force.system. The process of balance is a function of human coexistence, with emphasis on the skills of diplomats and statesmen, the sense of community of nations, the sharing of responsibilities, the desire and need to maintain the balance of the energy system. But because of this nuclear weapon, this balance is broken. Because of these nuclear weapons, the closest countries are most affected if another closest country has nuclear weapons. Example if India possesses nuclear weapon, our closest Sri Lanka, Pakistan and other countries are most affected by India's nuclear weapon. Another problem is if terrorists possess weapons nuclear, the problems will be multiple. For example, during the LTTE period, if they have weapons, it is difficult to beat them by the Sri Lankan army and many problems might arise. “The threat posed by terrorists attempting to launch a nuclear attack that could 'change our world' is real,” President Barack Obama said. The world has taken “concrete” steps to prevent nuclear terrorism, he said at the Nuclear Security Summit in Washington. But the so-called Islamic State (IS) obtaining nuclear weapons constitutes "one of the greatest threats to global security", he added. More than 50 nations were represented at the summit. (BBC News April 2, 2016). This shows how the problem will arise if terrorists possess nuclear weapons. The Nuclear Non-Proliferation Treaty (NPT) is an essential part of the global nuclear non-proliferation regime and establishes a comprehensive, legally binding framework based on three principles. 1. States which did not possess nuclear weapons in 1967 – a year before the treaty was opened for signature – undertake not to acquire them. 2. we know that the five states tested nuclear weapons as early as 1967 - the nuclear weapon states - and not to help other states acquire them and move towards eventual disarmament; and 3. Ensure access by non-nuclear-weapon States to civilian nuclear technology and energy development. The objective of the NPT is to prevent the proliferation of nuclear weapons and weapons technology, to promote the peaceful uses of nuclear energy, and to promote the goal of disarmament. The Treaty establishes a system of safeguards under the responsibility of the IAEA, which also plays a central role under the Treaty in the areas of technology transfer for peaceful purposes. This treaty was signed on July 1, 1968 and came into force on March 5, 1970. Anyway, most of the nations (1960 nations) have signed this treaty. But there are 5 nations that have not signed this treaty. India, Israel, Pakistan, North Korea and South Sudan have not signed this treaty. This is one of the weaknesses of the treaty. Scientists should be interested in the proliferation of nuclear weapons and understand the role that technology can play in mitigating the threat. Although it is natural for scientists to want to simplify the problem in a way that makes it concrete and solvable, forming a very simple overall model can lead to inappropriate, unnecessary, and even counterproductive solutions. Tensions surrounding nuclear weapons over the decades have simplified problem models, giving us simple answers. Concerns about nuclear proliferation are expected to limit the growth of nuclear power, but there are no rapid reforms to address the proliferation problem. Unfortunately, scientists are the worst criminals seeking easy answers through technological reform. During the 1960s, this model led many physicists and others to.