Human communication was revolutionized with the origin of speech approximately 500,000 BCE. Symbols were developed about 30,000 years ago. The imperfection of speech, which nonetheless allowed easier dissemination of ideas and eventually resulted in the creation of new forms of communications, improving both the range at which people could communicate and the longevity of the information. All of those inventions were based on the key concept of the symbol.
Communication history
The next advancement in the history of communications came with the production of petroglyphs, carvings into a rock surface. It took about 20,000 years for homo sapiens to move from the first cave paintings to the first petroglyphs, which are dated to approximately the Neolithic and late Upper Paleolithic boundary, about 10,000 to 12,000 years ago.
Petroglyphs
Pictograms
A pictogram (pictograph) is a symbol representing a concept, object, activity, place or event by illustration. Pictography is a form of proto-writing whereby ideas are transmitted through drawing. Pictographs were the next step in the evolution of communication: the most important difference between petroglyphs and pictograms is that petroglyphs are simply showing an event, but pictograms are telling a story about the event, thus they can for example be ordered chronologically.
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HISTORY
Casais Reveron L.