I think of something similar but less "news" lead - for example a backlog of the most "important" global issues (yes we can out climate change at number one) but it's things like "water shortages in southern sudan" at number 18 and so on that really will give perspective - when we see things like Brexit at number 67 that we know we have a proper balance.
I would start with a metric like "estimated number of excess human deaths from this issue in next year, five years fifty years" and have open transparent ways to assess the metric
I would start with a metric like "estimated number of excess human deaths from this issue in next year, five years fifty years" and have open transparent ways to assess the metric