精选优质文档-倾情为你奉上Chapter9 Power: The Kinds People Use and AbuseJohn Mack, who is the author of a book about power, says that the need for a sense of personal power is one of the primary forces in human life. On the other hand, he also says that a feeling of powerlessness is one of the most disturbing of human emotions a feeling to be avoided at all costs. Just what is power?Psychologists define power as the ability to determine or to change the actions or behavior of other people.