What are the themes in Miller's A View from the Bridge?

I think one of the biggest themes that this play points towards
is the recognition of a different code of laws in separate communities that often stands in
conflict with the national law. Miller presents us with a world that is full of Italian
immigrants, and thus the community operates under a mix of Sicilian and American laws. This
"code" is characterised by the protection of illegal immigrants, the importance of family and
hard work and the shipping culture and, most importantly for the play, the sacredness of trust
and the desire for revenge when a member of the community has been
wronged.

Clearly, however, when Eddie Carbone chooses to prevent the
marriage between Catherine and Rodolpho, he points out the massive conflict between this "code"
and the American system of justice. By appealing to American state law, Eddie Carbone forsakes
his own respect and identity which is incredibly important to him. Note how the small community
is shown as being victorious compared to American law in the way that the community avenges its
own member who has now turned against it. In spite of Alfieri's pleas to Marco that "only God
makes justice," Marco, on behalf of the community, makes his own justice by killing Eddie for his
betrayal of his community.