To what extent to complex realities and relationships of power make the concept of human rights an unachievable ideal?

The claim that complex realities and relationships of power make human rights ideals unattainable implies that these power relationships limit international cooperation on human rights issues, thus making the human rights notions of universality, indivisibility, inalienability and interdependence unachievable. On the one side of such a debate is the claim that sovereignty remains the ultimate standard of global politics, meaning that HR abuses under the claim of cultural relativism, are difficult to challenge and specifically undermine the universality and indivisibility of the human rights ideal. On the contrary, the effectiveness of regional courts such as the ECtHR serves as evidence that the complex power relationships can sometimes be overcome, and even state sovereignty challenged, in pursuit of human rights ideals. The ECtHR court supports this, challenging state sovereignty in the pursuit of justice. It can thus be drawn that the complexities of power relationships in global politics can be overcome through state consent to schemes of international justice, but that state sovereignty remains the basis of international relations, as even cases of effective HR jurisdiction rely on states' consent to such schemes of justice.