This document discusses two theories of motivation: Maslow's hierarchy of needs theory and McClelland's acquired needs theory. Maslow's theory proposes that people are motivated to fulfill five basic needs in a hierarchical order: physiological needs, safety needs, social needs, esteem needs, and self-actualization needs. McClelland's theory suggests that people acquire specific motivational needs over time based on life experiences, including a need for influence/power, affiliation, and achievement. The document provides explanations and examples of each theory but notes a lack of empirical support for Maslow's hierarchy.