No matter what we now know that ancient man did use wood in hunting and probably in other spheres of life. Since wood is easiest to form or build with it is possible that every stone advance came after a development that was earlier and based in wood.
The African finds that have most recently stirred the halls of science are roughly (very roughly) dated at the commencement of the Pleistocene or Ice Age, circa 600,000 B.C.; and at the Fifth International Congress of Anthropological and Ethnological Sciences, held at the University of Pennsylvania in 1956, Dr. Raymond Dart of Witwatersrand University, Johannesburg, South Africa, showed a convincing series of slides in which the implements of this pre-lithic (pre-Stone Age) culture were illustrated. These included the lower jaw bones of large antelopes, which had been cut in half to be used as saws and knives; gazelle horns with part of the skull attached, which showed distinct signs of wear and tear use, possibly as digging tool; and a great number of ape-man palates with the teeth worn down – human palates being used to this day as scrapers by some of the natives of the area. Primitive Mythology by Joseph Campbell, Page 359
The Stone Age (known to scholars as the Paleolithic era) in human prehistory is the name given to the period between about 2.5 million and 20,000 years ago. It begins with the earliest human-like behaviors of crude stone tool manufacture, and ends with fully modern human hunting and gathering societies. The Paleolithic is the earliest archaeology; anything older is paleontology. Today scholars divide the Paleolithic into three categories, more or less as follows.
Lower Paleolithic (sometimes called the Early Stone Age)
The Lower Paleolithic lasted between 2.5 million-200,000 years ago (or at least according to one permutation), and it was when the Hominin ancestors of human beings, including Australopithecus, Homo habilis, Homo erectus and Homo ergaster, roamed most of the earth and began making the first stone tools.
ScienceDaily (Feb. 11, 2011) — A fossilized foot bone recovered from Hadar, Ethiopia, shows that by 3.2 million years ago human ancestors walked bipedally with a modern human-like foot, a report that appears Feb. 11 in the journal Science, concludes. The fossil, a fourth metatarsal, or midfoot bone, indicates that a permanently arched foot was present in the species Australopithecus afarensis, according to the report authors, Carol Ward of the University of Missouri, together with William Kimbel and Donald Johanson, of Arizona State University'sInstitute of Human Origins.
The research helps resolve a long-standing debate between paleoanthropologists who think A. afarensis walked essentially as modern humans do and those who think this species practiced a form of locomotion intermediate between the quadrupedal tree-climbing of chimpanzees and human terrestrial bipedalism.
Researchers working in Ethiopia's remote Afar region have recovered evidence that humans began using stone tools and eating meat far earlier than previously thought. The finds—cut-marked animal bones dating to nearly 3.4 million years ago—push the origin of butchery back a stunning 800,000 years. Furthermore, these ancient butchers were not members of our own genus, Homo, but the more primitive Australopithecus, specifically A. afarensis, the species to which the celebrated Lucy fossil belongs.
"This discovery dramatically shifts the known time frame of a game-changing behavior for our ancestors,"Alemseged remarked in a prepared statement. "Tool use fundamentally altered the way our early ancestors interacted with nature, allowing them to eat new types of food and exploit new territories. It also led to tool-making—a critical step in our evolutionary path that eventually enabled such advanced technologies as airplanes, MRI machines and iPhones."