Theory X and Theory Y are theories of human work motivation and management. They were created by Douglas McGregor while he was working at the MIT Sloan School of Management in the 1950s, and developed further in the 1960s. McGregor's work was rooted in motivation theory alongside the works of Abraham Maslow, who created the hierarchy of needs. The two theories proposed by McGregor describe contrasting models of workforce motivation applied by managers in human resource management, organizational behavior, organizational communication and organizational development. Theory X explains the importance of heightened supervision, external rewards, and penalties, while Theory Y highlights the motivating role of job satisfaction and encourages workers to approach tasks without direct supervision. Management use of Theory X and Theory Y can affect employee motivation and productivity in different ways, and managers may choose to implement strategies from both theories into their practices. McGregor and Maslow McGregor's Theory X and Theory Y and Maslow's hierarchy of needs are both rooted in motivation theory. Maslow's hierarchy of needs consists of physiological needs (lowest level), safety needs, love needs, esteem needs, and self-actualization (highest level). According to Maslow, a human is motivated by the level they have not yet reached, and self-actualization cannot be met until each of the lower levels has been fulfilled. Assumptions of Theory Y, in relation to Maslow's hierarchy put an emphasis on employee higher level needs, such as esteem needs and self-actualization. McGregor also believed that self-actualization was the highest level of reward for employees. He theorized that the motivation employees use to reach self-actualization allows them to reach their full potential. This led companies to focus on how their employees were motivated, managed, and led, creating a Theory Y management style which focuses on the drive for individual self-fulfillment. McGregor's perspective places the responsibility for performance on managers as well as subordinates. Theory X Theory X is based on negative assumptions regarding the typical worker. This management style assumes that the typical worker has little ambition, avoids responsibility, and is individual-goal oriented. In general, Theory X style managers believe their employees are less intelligent, lazier, and work solely for a sustainable income. Management believes employees' work is based on their own self-interest. Managers who believe employees operate in this manner are more likely to use rewards or punishments as motivation. Due to these assumptions, Theory X concludes the typical workforce operates more efficiently under