Memento Mori :A warning or reminder of the inevitability of death, esp. a skull or other symbolic object. Later sometimes in weakened use: any grim, ominous, or sobering symbol (dictionary.oed.com).
Asia, Africa, and Latin America in a similar economic position four decades ago
: now huge income gaps among them.
Countries in East Asia: the top position
Latin America: in the middle
Africa: on the bottom.
: some African countries have deteriorated since 1960