Fig. 1

The evolution of risk networks over five years from 2013 to 2017. Although the number of risks vary over the years, the five groups of risk remain unchanged. We use the same layout for each year network and fix the relative positions of risks with the same index over the years. The risks are in five color groups and five location groups. A color group is the category of a risk in a certain year labeled by experts, while locations of the groups are labeled by us and remain unchanged over the years. The groups are as follows: economic, with mostly blue nodes placed leftmost of the network and including risks 01-10; environmental, with mostly green nodes placed the second to the left and at the bottom part of the figure with risk 11-16; geopolitical, with mostly orange nodes placed in the middle and at the top of the figure with risk 17-25; societal, with mostly red nodes placed the second to the right and at the bottom of the figure with risk 26-36; technological, with purple nodes placed the rightmost of the figure with risk 37-42