Self-actualization is a term that has been use in various psychology theories, often in slightly different ways (e.g., Goldstein, Maslow, Rogers). The term was originally introduced by the organismic theorist Kurt Goldstein for the motive to realize all of one's potentialities. In his view, it was the master motive - indeed, the only real motive a person has, all others being merely manifestations of it. However, the concept was brought to prominence in Abraham Maslow's hierarchy of needs theory, as the final level of psychological development that can be achieved when all basic and meta needs are fulfilled and the ‘actualization’ of the full personal potential takes place.