Maslow believed that these motivating forces operate more or less sequentially. That is, as needs at one level are partially or fully satisfied, those at the next are felt more intensely. Lower-level needs must be met or partially met if higher-level needs are to emerge. Although no level of need may ever be completely satisfied, as satisfaction at one level increases, the need at the next level becomes a stronger and stronger motivator. Marketers, managers, and social scientists have used Maslow’s hierarchy extensively to understand what motivates people and how these motivations can be applied in a wide variety of manners to consumers and people in general the world over.