The most important and influential discovery was the practice of surgery. With this invention, human life became more sophisticated, humans lived longer, and we obtained knowledge of ourselves sufficient enough to break the boundaries built by ignorance. Lacking prescription drugs, accurate tools, computer technology, and any background experience to build from, our ancestors struggled to learn how to repair the human body. They did a surprisingly competent job of treating the sick and injured. Some …showed first 75 words of 2621 total…

…showed last 75 words of 2621 total…