Humans rule this planet. Throughout all recorded history, humans have ruled over animals. Even when being hunted by other creatures, humans have the ability to outsmart their predators.

What's more is that humans are able to ponder great problems, and have developed an understanding of complex truths about the universe, and have developed religions to explain what happens after death and how the world was created.

A gorilla has no such prospects. A gorilla will never ponder the nature of the Godhead, or contemplate it's existence at all, or even ponder his own existence. To suggest that a gorilla has the same value of life as a human has no basis in reality.