 Devlin identifies a series of “factors which should restrict the use of the criminal law”, even where an immorality or moral wrong has been identified (Devlin 1965: viii). Balances must be struck as between “factors of principle” and “factors of expediency” (we examine some of these in the next section). Hence it will often be the case that the posited wrongness or immorality will not be a sufficient ground for legal coercion.