Everyone knows that large companies share board members, but it’s hard to appreciate just how enmeshed global governance has been for decades until you see the connections. I partnered with Meindert Fennema of the University of Amsterdam and William K. Carroll from the University of Victoria to show how companies’ boards interlock and to study the implications for when a crisis hits. We plotted shared directorships among 176 large companies in 1976 and 2013, two years that followed a major global economic crisis.