The proliferation of nuclear weapons is one of the most serious global problems facing humanity today. Since the mid-20th century, the development of nuclear technologies has given people both a major source of energy and an unprecedented destructive power. However, the uncontrolled spread of these weapons poses a grave threat to world security. This problem is not only about armament but also has deep political, economic, environmental, and humanitarian consequences. Nuclear weapons work through reactions that occur when atomic nuclei split or fuse. Their power is so great that the detonation of a single bomb can instantly kill tens of thousands of people and wipe cities off the face of the earth. The primary danger of these weapons is not only their explosive force but also the radiation, long-term environmental contamination, and genetic damage that accompany them. Preventing the spread of nuclear weapons is the common duty of all humanity, not just of individual states.