National Geo. - Origins The Journey of Humankind Series 1 (2017) Part 4 Writing on the Wall

Origins The Journey of Humankind

Our primal curiosity has sparked new inventions and revealed the mysteries of the universe. This eight part series strives to trace the pivotal innovations that make us modern.

Part 4 Writing on the Wall

If knowledge is power, communication is the jet fuel, the delivery system, the gift we give each other that links the modern world. But it has a dark side.

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