Any contract to commit a crime is in of a statute and therefore unenforceable. A contract to sell illegal drugs in violation of
criminal laws is because it is a crime. A contract to smuggle undocumented workers into the United States for an employer is and therefore unenforceable.
An unenforceable contract is any contract that is aimed at committing a crime such as selling of drugs, smuggling of goods and any other thing like those which is against the law.
Such contract cannot be enforced because it is albinitio in support or an illegal venture or activity.