Valid ethics can be logically derived from first principals or axioms. Pretty straight forward really if you’re not a left wing loon.
Start with the axiom of existence and it’s corollaries the law of identity and the law of cause and effect. Correctly define ‘human’ as ‘the rational animal’ then the right to ‘life, liberty and property’ naturally follow. Anything in conflict with these rights are unethical or immoral.
You’re welcome.