How The World Was One by Arthur C. Clarke

A lively popular-history and forward-looking account of how human communication technologies evolved from smoke signals and semaphore to telegraph, telephone, radio, undersea cables and finally to satellites, showing how each leap reshaped politics, commerce and everyday life; it explains the technical breakthroughs (including the concept of geostationary satellites), chronicles the institutions and personalities that drove change, and reflects on the social consequences of an increasingly interconnected world — from censorship and inequality to the promise of instant global exchange.