Humans need food, sleep, safety, love, purpose. Psychologist Abraham Maslow ordered our needs into a hierarchy. This week, TED speakers explore that spectrum of need, from primal to profound.
Margie Lachman: How Did Abraham Maslow Change Psychology?
Russell Foster: Why Do We Need Sleep?
Bruce Schneier: What Does It Take To Feel Secure?
Sebastian Junger: How Does War Teach Soldiers About Love?
Caroline Casey: What Defines A Person's Sense Of Self?
Mihaly Csikszentmihalyi: What Makes A Life Worth Living?
from NPR’s TED Radio Hour