As Valerie Hansen shows in “The Year 1000,” the world was already genuinely interconnected a millennium ago. ... Valerie Hansen argues in her fascinating new book, “The Year 1000,” had begun.

“They lived in a globalised world, pure and simple,” Valerie Hansen insists. Her book, however, takes a familiar argument much further. She maintains that, around the year 1000, new trans-oceanic ...

As Valerie Hansen shows in this fascinating book, much of the inhabited globe already had complex systems of long-distance trade more than a millennium ago. Only one continent, Australia, seems to ...