The question of whether there can be a universal conception of human rights is one of the most enduring and complex debates in political philosophy and international relations. While the Universal Declaration of Human Rights (UDHR) and subsequent international covenants assert universality, the concept faces significant challenges from cultural relativism.

Arguments for Universality:

1. Inherent Human Dignity: Proponents argue that human rights are inherent to all individuals simply by virtue of their humanity, irrespective of culture, nationality, gender, or any other characteristic. They derive from a shared understanding of human dignity and the fundamental needs for a life of worth.
2. Moral Imperative: Certain core rights, such as the right to life, freedom from torture, slavery, and arbitrary detention, are considered so fundamental that their violation is universally condemned as morally reprehensible. These are often seen as non-derogable rights.
3. International Consensus: The existence of the UDHR, adopted by the UN General Assembly in 1948, and subsequent international human rights treaties (like the ICCPR and ICESCR) demonstrates a broad, albeit imperfect, global consensus on a common set of rights. These documents serve as a universal standard against which state conduct can be judged.
4. Protection Against State Abuse: A universal standard provides a crucial check on state power, preventing governments from claiming cultural justifications for abuses against their own citizens. It offers a basis for international intervention and advocacy when fundamental rights are violated.
5. Common Human Experience: Despite cultural differences, humans share common vulnerabilities, aspirations, and needs, which universal rights aim to protect and fulfill.

Arguments Against Universality (Cultural Relativism):

1. Cultural Diversity: Critics argue that human rights are culturally specific, reflecting the values, traditions, and social structures of particular societies. What is considered a 'right' in one culture may not be in another, or may be prioritized differently.
2. Western Imposition: Many non-Western scholars and states view the current human rights framework as a product of Western liberal thought, emphasizing individual autonomy and civil-political rights, which may not align with collectivist or different religious traditions prevalent elsewhere. They see it as a form of cultural imperialism.
3. State Sovereignty: Some states argue that human rights are an internal matter and that external criticism or intervention based on universal standards constitutes an infringement on their national sovereignty.
4. Prioritization Differences: Different cultures may prioritize collective rights over individual rights, or economic and social rights (e.g., right to development) over civil and political liberties, leading to conflicts in interpretation and implementation.

Conclusion: While a 'thick' universalism that dictates every detail of rights implementation across all cultures is likely unattainable and undesirable, a 'thin' universalism focusing on a core set of fundamental, non-derogable rights is widely accepted. This approach acknowledges that while the principles of human rights (e.g., dignity, non-discrimination) are universal, their expression and implementation can vary culturally, provided they do not undermine the core principles. The ongoing dialogue between universalism and cultural relativism helps refine and strengthen the human rights framework, ensuring it remains relevant and respected across diverse global contexts.