Final answer:
The theme from 'Al Capone Does My Shirts' is the complexity of human nature, showing that people, including criminals, have multidimensional characteristics.
Step-by-step explanation:
A theme from Al Capone Does My Shirts is the complexity of human nature. The protagonist, Moose Flanagan, lives on the infamous Alcatraz island, where his father works as a prison guard. Living in close proximity to convicts, Moose learns that people cannot be labeled simply as 'good' or 'evil.' The book juxtaposes the idea that even a notorious criminal like Al Capone has a softer side, as he's shown to be helping Moose's autistic sister. This reflects a deeper theme that everyone has multidimensional characteristics.