Answer
Macbeth is not at peace because, in order to become a king, he murdered the previous king, Duncan. Not only does this murder make Macbeth consumed with guilt, but it triggers a series of events that make him feel more and more uneasy. Macbeth later murders Banquo, convinced that he also represents a threat to his power, while Duncan's son plots a revenge against Macbeth.
Referent power is gained by a leader who has strong interpersonal relationship skills.
A person who has strong referent power is usually a leader who has great charismatic traits and strives to make others feel comfortable and happy.\ in his/her presence.
You forgot to put the rest of the problem,
pre-history
Pre is the prefix history is the base word/root word.
Hope I was able to help. :)