The document provides a history of knives from ancient times to the 18th century. It notes that in ancient times, knives were made of stone and were very dull. In the Middle Ages, knives began to be made of metal but were used primarily for non-culinary purposes. By the 16th century, knives were more commonly used for cooking and eating and were sometimes made of silver. Table knives of the 18th century looked very different from previous centuries, having blunt, curved blades intended for tasks like spreading butter rather than cutting.