A weapon is any tool or device designed to inflict harm or damage on living beings or objects. Weapons can be classified into various categories, including firearms, knives, explosives, and non-lethal options like pepper spray. They are often used in military, law enforcement, and personal defense situations. Throughout history, weapons have evolved significantly, from simple tools like spears and bows to advanced technology such as drones and nuclear weapons. The development and use of weapons raise important ethical and legal questions regarding their impact on society and global security.