How does kings appeal to eternal natural law help him examine human laws?

King's appeal to eternal natural law serves as a moral framework that critiques human-made laws, highlighting their potential injustices. By referencing a higher moral standard, he argues that laws must align with principles of justice and equality. This perspective allows him to challenge discriminatory laws, asserting that they lack legitimacy when they contradict fundamental human rights. Thus, he advocates for civil disobedience against unjust laws, emphasizing a moral duty to uphold true justice.