Persons with disabilities constitute 15 per cent of the world population, approximately one billion people. Many of them require different forms of support, including for basic day-to-day activities such as getting up, bathing, dressing and eating. The sustained ageing of the global population, particularly in high-income countries, has also had a substantial impact on the demand for disability-related support, as older persons tend to be overrepresented in the disability community. Other sociopolitical factors such as conflict and migration increase the demand for support, as support networks tend to fall apart in such situations.