Problem: Summarize and simple Several alternative theories have been proposed based upon Maslow's hierarchy. One of the most well-known is the Alderfer ERG Theory. Clayton Alderfer used the ERG Theory to fill holes in Maslow's hierarchy of needs. Alderfer classified needs into three categories: (E)xistence, (R)elatedness, and (G)rowth. Existence needs coincide with Maslow's physiological and security needs. In an organization, wages would meet existence needs. Relatedness needs coincide with Maslow's social and esteem needs. Relationships with co-workers can help fulfill an employee's relatedness needs. However, whereas Maslow combined external (from other people) and internal esteem needs into one category, Alderfer believes that internal esteem needs have more to do with self-actualization. He therefore combines internal esteem needs with Maslow's concept of self-actualization as growth needs. In an organization, this might translate into an employee trying to pursue higher work goals because of the satisfaction they receive from them. Need Assignment Help?