In the debate between positivism and non-positivism, the argument from relativism plays a pivotal role. The argument from relativism, as put forward, for instance, by Hans Kelsen, says, first, that a necessary connection between law and morality presupposes the existence of absolute, objective, or necessary moral elements and, second, that no such absolute, objective, or necessary moral elements exist. The reply presented here is that absolute, objective, or necessary moral elements do exist, for human rights exist, and human rights exist because they are justifiable. The analytical basis of the justifiability thesis is a distinction between eight approaches. The first six have more defects than strengths, but there are two approaches that are able to solve the justification problem to a sufficient degree.