One of the earliest landmark breakthroughs in the field of general surgery was the introduction of safe anaesthesia and aseptic techniques. Before these discoveries, operations were severely limited due to pain, infection, and high mortality. The adoption of antiseptic methods by pioneers like Joseph Lister completely transformed surgery, disproving older beliefs that infections were caused by “bad air” and establishing the foundation for clean, scientific, and life-saving surgical procedures used in hospitals today.