While the rest of us can’t imagine life without beauty, its absence would certainly make life easier for evolutionists. They will just have to accept their beautiful plight. I don’t often think about evolution, but I recently found myself doing so under the warm, cerulean waters of Sharks Cove on the North Shore of Oahu. I was snorkeling, taking in the tropical fish schooling around me. I thought, how did their diverse and extravagant beauty come to exist? If natural selection is the engine that created the living world, what is the reason behind this opulence? Why does beauty even...