This document provides an overview of world history from prehistory to the Neolithic Revolution. It describes how prehistory is defined as before writing began 5000 years ago. During the Old Stone Age (Paleolithic Age, 2.5 million to 8000 BC), the earliest tools date back to this era. The Great Leap Forward around 50000 BC saw innovations like fish hooks, arrows, and art emerge. The New Stone Age (Neolithic Age, 8000 to 3000 BC) saw developments like polished tools, pottery, crop growing, and animal domestication. The Neolithic Revolution around 10000 years ago involved the domestication of plants and animals, leading to urbanization, social hierarchies, and population growth.