“Our chief reason for over-rating the importance of tools and machines is that man’s most significant early inventions, in ritual, social organization, morals, and language, left no material remains, while stone tools can be associated with recognizable hominid bones for at least half a million years.”

“Our chief reason for over-rating the importance of tools and machines is that man’s most significant early inventions, in ritual, social organization, morals, and language, left no material remains, while stone tools can be associated with recognizable hominid bones for at least half a million years.”

— Lewis Mumford