This topic shares the scale of disability worldwide. According to the World Health Organization, about 1.3 billion people, roughly 1 in 6 of us, live with a significant disability. That makes it one of the largest groups in the world, larger than the population of most countries. The number keeps growing due to aging populations, rising chronic conditions, and better diagnosis. Learners take away that disability is not a small or niche issue, it is a mainstream reality present in nearly every family, workplace and community.