As the UN commemorates World Day of Social Justice on February 20, we’re taking a look at one of the key challenges the world is facing in the coming decades: the gradual and largely irreversible shift towards an older population. According to the United Nations Population Division, the number of persons aged 65 and older is expected to double over the next three decades, reaching 1.6 billion in 2050. As the following chart shows, Asia is at the forefront of this trend, with Hong Kong, South Korea and Japan expected to have the highest share of people aged 65 and...