This document provides a biography and overview of the influential adult educator Malcolm Knowles. It discusses his early life and education, as well as his career developing concepts like informal adult education, andragogy (the study of adult learning), and self-directed learning. Knowles is considered the central figure in popularizing andragogy and helping to reorient adult education from a focus on teaching to facilitating learning. The document reviews his key works and contributions to the field of adult education.