A unilateral breach of contract involves an indirect use of physical force: it consists, in essence, of one man receiving the material values, goods or services of another, then refusing to pay for them and thus keeping them by force (by mere physical possession), not by right — i.e., keeping them without the consent of their owner. Fraud involves a similarly indirect use of force: it consists of obtaining material values without their owner’s consent, under false pretenses or false promises.