How has mr.Morrison helped uncle hammer?which incident from another chaptee prepares the reader to believe mr.Morrison is a wise advisor

Cassie tells Uncle Hammer about her visit and being humiliated yet again. Cassie is forced to apologies (twice) after being insulted and is knocked off the sidewalk by Charlie Simms. Uncle Hammer gets very angry, particularly at Mr. Simms. He mutters something about getting his gun and leaves in a car. Mr. Morrison follows Uncle Hammer and is able to talk him down. Confronting a white man would have been devastating for Uncle Hammer and the family.Mr. Morrison is wise enough to know what is done to black men and their families if they attack white people.