“The world is aging” is a correct and true statement but I suspect it is misleading to most readers (see below):

The world is aging, and our economy is shrinking. This is not a good combination. Let’s start with demographics. The five largest economies, U.S., China, Japan, Germany, and the U.K., have an …

Source: Column: Demographics and stagflation | Highlandsranchherald.net

The author’s concern is valid – how do we pay for retirements and health care as the population gradually becomes older due to the low fertility rate and smaller cohorts among younger workers?

“The world is aging” implies this is occurring because we are making old people. Kind of but not exactly. We are making fewer young people than we did during the “Baby boom” period of the 1950s-1960s. That large cohort is aging over 65 and having longer life spans. Hence, the proportion of the population 65 and up is increasing relative to younger cohorts.

The above article does not mention that populations are on a path to decreasing due to low fertility rates. Reminder, this is the U.S. fertility rate – our population has increased due to immigration.

Immigration may very well solve this problem in the U.S. – it now accounts for the majority of population growth. By importing younger workers, we may solve this conundrum in the U.S.; other countries may not be as successful with this strategy, however.

U.S. fertility rate chart
Coldstreams