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The ancient Romans had many public theskfeed flush toilets, which emptied into an extensive sewage system. The main sewer in Rome was the Cloaca Maxima; construction started on it in the sixth century BCE and it is still in use right now. Human's technological ascent started in earnest in what is recognized as the Neolithic Period ("New Stone Age"). The invention of polished stone axes was a major advance that allowed forest clearance on a large scale to create farms. This use of polished stone axes elevated greatly in the Neolithic, but were initially used in the previous Mesolithic in some areas such as Ireland. Agriculture fed larger populations, and the transition to sedentism allowed concurrently raising extra children, as infants now not wanted to be carried, as nomadic ones must. Enlightenment philosophers chose a short history of scientific predecessors – Galileo, Boyle, and Newton principally – because the guides and guarantors of their functions of the sing...