The earliest and longest part of the Paleolithic stage of development. The Lower Paleolithic began with the Oldowan tool tradition of Homo habilis and continued with the Acheulian tradition of Homo erectus and early archaic humans. The Lower Paleolithic began about 2. 5-2. 4 million years ago and continued until after 100,000 years ago. Lower Paleolithic tool making was the height of technology for most of the time that we have been human.