The document summarizes the evolution of hominids and their tool-making abilities over time. It describes 6 stages of hominid evolution from Australopithecus, which did not make tools, to Homo Habilis, the first to create tools by hitting stones together, to Homo Sapiens Sapiens, which developed advanced tools including iron, steel, guns. With each successive stage, brain size and tool-making capabilities became more advanced, allowing hominids to hunt more effectively and have technological advantages over others.