 Like Hägerström, Karl Olivecrona and Alf Ross, he resists the exposition of rights as metaphysical entities, arguing that realistic legal analysis should dispense with them.Lundstedt's main focus in his theoretical work became a sustained attack on what he called the method of justice.He considered that there was no objective way to define the requirements of justice and that invocations of justice cloaked purely subjective preferences or unacceptable metaphysical claims.