ABSTRACT In Berkeley’s Passive Obedience, moral duties are negative and positive as well as civil or legal and natural. Natural duties are from God and therefore valid norms. The supreme civil authority makes civil laws. We must obey the law because loyalty to supreme civil power is one of our natural duties: to be loyal is to obey, which means ‘do not rebel.’ This is a negative duty and as such categorical or unconditional. Positive duties are conditional on conscientious acceptance. (...) I show in detail how this system of norms and duties works. These key ideas have not been studied in detail before. Next, can we criticize Berkeley’s unquestioning acceptance of chattel slavery if we apply his own notion of duties to it? The slave laws are necessarily evil, and hence they, according to Berkeley’s own doctrine, cannot be accepted. But first we need a clear conception of his idea of conscience and, a fortiori, conscientious objection and its legitimate scope. This paper fills the gap and helps us understand Passive Obedience better. (shrink)