This paper seeks to elucidate the role played by the common good in John Finnis\u27s arguments for a generic and presumptive moral obligation to obey the law.1 Finnis\u27s appeal to the common good constitutes a direct challenge to liberal and philosophical anarchist denials of a generic and presumptive obligation to obey the law.2 It is questionable, however, whether Finnis has presented the strongest possible case for his position. In the first section I outline Finnis\u27s account of the relationship between basic goods, the common good, and the authority of law. Section II demonstrates how Finnis\u27s emphasis upon the instrumental nature of the common good leaves his position vulnerable to Joseph Raz\u27s objections3 that not all cases...