According to how did early man communicate with each other?
Answers
Depends how early. The first species categorised as human, or ‘Homo’ was Homo Erectus, about 2.5 million years ago, although that is a purely arbitrary classification to mark the gradual change from Australopithecines to Erectus. Since many animals today communicate, it is certain that they had ways of doing so. Many animals recognise a number of distinct sounds and know the meaning. Prairie dogs look up if the warning sound for hawk is called, which is sometimes given by birds in a different language.
How sophisticated were those early humans. They were reasonably intelligent. Perhaps close to today’s Chimpanzees. Probably smarter. Voice boxes are soft tissue, do it is difficult to infer speaking ability from that. However, from our best estimate of the shape of the Erectus brain, taken from inner skull shape, it seems that they had a similar shape in the language areas to modern humans but not like today’s apes.
It is thus thought likely, but by no means certain, that these early humans could speak. We have no way of knowing how sophisticated their language was.
Moving forward to the first Homo Sapiens 200,000 years ago, and it is almost certain they spoke. Indeed, it is thought that Home Neanderthalis and Homo Denisova could probably speak to each other too, and in a sophisticated way. Neanderthals had spiritual beliefs, had burial ceremonies and made idols. Impossible to believe they could have done this without language.
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yes they communicate with fingers