This document summarizes the evolution of tool use among early human species from Australopithecus afarensis to modern Homo sapiens sapiens. It describes how tools started as sharp rocks and have advanced to modern tools. Early humans like A. afarensis did not make tools but used found rocks and sticks. Homo habilis were the first to make sharp rock tools and discover fire. Homo erectus could create fire and used stone axes and knives. Neanderthals created more complex tools from different materials. Homo sapiens used bows and arrows and created boats and art. Modern humans continue advancing tools with materials like metal and plastic.
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