Ghost of a flea

As a geographer, it is my pedantic duty to point out that the Total Children and Total Elderly maps are potentially misleading. They show raw numbers rather than normalizing the values to a percentage according to total population for each country. Without doing that, one doesn't have a sense of how much the number is simply a function of a country's total population size (e.g. large nations naturally have more elderly).

Their maps are quite striking nevertheless!