Nathan Clifford, French v. Shoemaker (81 U.S. 314…
“ Actual violence, even at common law, is not necessary to establish duress, because consent is the very essence of a contract, and if there be compulsion, there is no actual consent, and moral compulsion, such as that produced by threats to take life or to inflict great bodily harm, as well as that produced by imprisonment, is everywhere regarded as sufficient in law to destroy free agency, without which there can be no contract, because in that state of the case there is no consent. ”
