He did not change our world, but he did change our understanding of it. The laws of physics which he developed primarily from mass, gravity and motion lasted for over 200 years until the special theory of relativity rendered some of it obsolete. It's still pretty good though for most things. Newton was an odd type. His seminal work, "Principia Mathematica" was written in Latin and he admitted to deliberately making it hard to understand, to discourage others from discussing it with him or challenging his conclusions. As well as being a scientist and mathematician, he also believed in alchemy and astrology, odd for a man of science.
