Final answer:
The invention of paper in ancient Egypt has had the greatest impact on the world.
Step-by-step explanation:
In my opinion, the invention of paper in ancient Egypt has had the greatest impact on the world. The Egyptians created a durable and versatile writing surface out of papyrus, which revolutionized the way information could be recorded and transmitted. This technological advancement allowed for the dissemination of knowledge and ideas on a much larger scale, leading to the preservation and expansion of human knowledge throughout history.