Ageism, defined as stereotypes, prejudices, and discrimination based on age, is a pervasive phenomenon across individuals, settings, historical periods, and cultures. To address the universality of ageism, we explore three main questions: (a) Does ageism happen throughout the course of a person's life? (b) Does ageism permeate all spheres of life? (c) Does ageism exist all around the world? We conclude that although ageism is universal, there are substantial variations in its definition, manifes