"'no man is an Island' is a liberal mind set."
It's actually a New Covenant concept:
"But in fact God has placed the parts in the body, every one of them, just as he wanted them to be... there are many parts, but one body." (I Corinthians 12)
Interdependence is a concept that is deeply rooted in our founding documents and a concept that can be found in legal writings dating back as far as the Magna Carta.
The idea that my actions affect more than just myself is what was once called civilized, or civil, behavior.