The document summarizes key concepts from Chapter 6 of Organizational Behavior by Stephen P. Robbins on motivation. It discusses [1] Maslow's hierarchy of needs theory which proposes humans have physiological, safety, social, esteem and self-actualization needs that become dominant as lower needs are met. It also discusses [2] McGregor's Theory X and Theory Y about assumptions about employee motivation and [3] Herzberg's two-factor theory that proposes motivators like achievement and recognition lead to job satisfaction while hygiene factors prevent dissatisfaction.