If, indeed, they are, are there any parallels to be drawn between Baroa rock paintings and Egyptian hieroglyphics? I think not. Egyptians painted a pharaoh or a pyramid or a bird in flight when they wanted to paint, and they scribbled hieroglyphics when they wanted to write. Why is southern African Baroa art being bundled off as a writing system? I do not think for a minute that those artists who decorated their homes with pictures of animals and people were trying to communicate some primitive, subliminal message, because that is what it boils down to: others can paint, Baroa wrote.
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Written language is a also [sic] a human invention, like spoken language, but it is not a universal invention. Few societies have invented a writing system for themselves - most have been borrowed and adapted from the original inventors. Civilisations as advanced as the Incas have had no writing. The civilisations of the written word were limited mainly to Asia, Europe and the Middle East. Writing systems in the New World, the Pacific, and much of Africa were usually primitive. Where no records remain, we do not know what vanished civilisations may have achieved, but into this century many hundreds of languages and societies have remained preliterate. Two thirds of the world's languages are still unwritten, and there are only several hundred different writing systems. Learning to read is not as natural as learning to talk, despite the hopeful notions that it ought to be. [ Source... ]