Advocating for senior citizens in an aging world More than 500 million people aged 65 and above—over half the age group—currently live in cities, with the majority living in low- and middle-income countries. [2] This rapidly aging urban population requires an understanding of the factors that affect older people in the cities where they live. Also, as cities may further marginalize those already excluded from spaces, services, and society in older age, the demand for relevant data and evidence that would hold stakeholders accountable in delivering improvements that benefit older people and the broader communities is increasing. Image from HelpAge International