Final answer:
Sir Francis Bacon's greatest contribution to our world was his development of the scientific method.
Step-by-step explanation:
Sir Francis Bacon's greatest contribution to our world was his development of the scientific method. He is credited with being the first to define the scientific method, which is a systematic approach to acquiring knowledge through observation, experimentation, and analysis. Bacon emphasized the importance of empirical evidence and induction in scientific inquiry, paving the way for advancements in scientific research and discoveries in various fields.