Here’s a list of 100 major events—spanning science, politics, war, technology, and culture—that have significantly shaped human history and changed the world: Ancient History Invention of Writing (c. 3200 BCE) – Sumerians develop cuneiform. Code of Hammurabi (c. 1754 BCE) – First major codified legal system. Founding of Ancient Egypt's Old Kingdom (c. 2700 BCE)...