Perhaps the most pervasive trait of religion is its ability to construct worldviews. Even when the religion is eventually abandoned, the worldview remains. Most scientists would deny that religion lies behind their perspectives, but in the case of human exceptionalism it remains the most logical cause. I always eagerly await new books by Frans de Waal. Ever since I read his book on empathy and apes, I couldn’t wait for the next one. His latest book, Are We Smart Enough to Know How Smart Animals Are?, although the title is a mouthful, does not disappoint. As I’ve noted before about his works, de Waal is perhaps the most sensible person writing in science today. He considers the evidence and takes his own biases into account. In a competitive world where science money is often doled out to those who can exclude others, de Waal is willing to leave the door open when the evidence demands it.

What is really ironic is that evolution has become the line in the sand between biblical literalists and science. As de Waal points out, the idea that people are different from the animals from which they evolved—in some qualitative way—is an idea based on religion. Many scientists still hold to it in a way that can only be described as, well, religious. This is very strange when evolution works by gradual changes over long periods of time. When did humans gain whatever trait that separates them from “the animals”? When I was a child it was tool use. When that was disproved, it became language. When that was disproved it became consciousness. The latter is the safest since nobody really knows what it is. As de Waal amply demonstrates the Behaviorist school was clearly wrong about animals (including humans). What no Behaviorist wants to admit is that the idea that we alone are conscious comes from the cultural interpretation of the Bible.

Are We Smart Enough to Know How Smart Animals Are? is, like many of de Waal’s books, full of wonderful observations of the ways animals actually behave. They solve problems. They learn from experience. They anticipate the future. In some cases they have been shown to outperform humans on cognitive tasks. And yet we still insist that people are somehow different. Better. Interestingly this is one area where religions and science tend to agree. People are just more important than animals. I wonder if one of the underlying reasons—not addressed by de Waal—is that we have come to depend on a lifestyle that unfairly exploits animals. After all, we eat them, use them for work, and even experiment on them. If we admit that they are intelligent we would need to, yes, rethink all of this. Given what’s happening in the world today, it is perhaps time to admit what we don’t really know.