"The ships, railroads, and trucks that transport containers worldwide form the backbone of the global economy. The pace of globalization over the last sixty years has accelerated due to containers; just like canals and railroads defined earlier phases in the development of a global economy. While distance used to be the largest obstacle to regional integration, these successive waves of transportation improvements have functionally made the world a smaller place. Geographers refer to this as the Space-Time Convergence."
Via Seth Dixon