"Aging is not a problem to be fixed or a disease to be cured," she says. "It is a natural, powerful, lifelong process that unites us all." - Ashton Applewhite
What is age diversity?
Ageism refers to the stereotypes (how we think), prejudice (how we feel), and discrimination (how we act) towards others or oneself based on age.
Source: World Health Organization: https://www.who.int/news-room/questions-and-answers/item/ageing-ageism
Ayalon L. (2018). Perceived Age Discrimination: A Precipitator or a Consequence of Depressive Symptoms? The Journals of Gerontology. Series B, Psychological Sciences and Social Sciences, 73(5), 860–869. https://doi.org/10.1093/geronb/gbw101
Jackson, SE, Hackett, R., & Steptoe, A. (2019). Associations between age discrimination and health and wellbeing: cross-sectional and prospective analysis of the English Longitudinal Study of Ageing. The Lancet Public Health, 4(4), e200–e208. https://doi.org/10.1016/S2468-2667(19)30035-0
Lyons, A., Alba, B., Heywood, W., Fileborn, B., Minichiello, V., Barrett, C., Hinchliff, S., Malta, S., & Dow, B. (2018). Experiences of ageism and the mental health of older adults. Aging & Mental Health, 22(11), 1456–1464. https://doi.org/10.1080/13607863.2017.1364347
Age Discrimination and Diversity, 1st ed. (2011)
Ageism: Negative and Positive, 2nd ed. (1999)
Ageism: Stereotyping and Prejudice Against Older Persons, 1st ed. (2002)
Being Mortal, 1st ed. (2017)
Culture, Heritage, and Diversity in Older Adult Mental Health Care (2018)
The End Game: How Inequality Shapes Our Final Years (2015)
Future Directions for the Demography of Aging by 
Geriatric Medicine: an Evidence-Based Approach (2014)
