This paper assesses competing views on the question as to whether morality is a necessary precondition for creating an authoritative obligation to follow the law. Firstly, the scope of the discussion is defined. Then, the positions of Legal Positivism and the opposing jurisprudential camp of Natural Law are outlined by evaluating the rivalry between the two philosophical movements. Next, Ronald Dworkin’s theory is examined in light of the debate as to whether law should be connected with morality. The question is also explored through a variety of practical examples and judicial decisions. In conclusion, it is submitted that morally-underpinned laws serve as an essential requirement for having a workable and efficient legal system where its subjects are under a genuine authoritative duty to obey the law.