Human Rights and Species-Principle

The concept of Human Rights plainly exemplifies a Species-Principle.  However, as normative, not descriptive, the concept is not necessarily ingredient in actuality, e. g. it surely seems lacking in the genocides that occur, and, so, is not necessarily indicative of a fundamental determinant of human activity.  On the other hand, the pervasive repudiation in recent centuries of the long-time inhumanity of Slavery is an indication of a progress that may eventually eliminate other apparent counter-examples to thesis that human activity is fundamentally determined by a Species-Principle, one that is essentially Evolutionary.