according to atticus what was the dirrerence between the cunninghams and the ewells? why did atticus select a cunninghams for the jury?

Atticus knew Mr. Cunningham had honour and respect. Despite being racist, Atticus felt he could get past the hate and appeal to Cunningham's humanity. Bob Ewell was pretty much set in his twisted ways.

As a result of the conviction, what conclusion did jem draw about boo radley's seclusion?