It's not a question of if. It's a question of when will there be another mass extinction. And when it does take place, provided it is not an actual world ending event, a dominant species will eventually evolve. Will it be as intelligent as us, perhaps. It might even be more intelligent. It might not waste its time bickering, feuding, and killing over petty, insignificant differences such as skin color, place of birth, religion, sexual orientation, or any of the other thousands of delusional reasons humankind finds for validating their perceived superiority over others that also bleed red.