Hudson thought these physical and emotional states—the joy of play, the love of beauty in other beings, the pleasure of making sounds with our bodies—were shared by all animals, and far more than incidental to life or evolution. He was certain that animals’ lives felt no less consequential to them than ours do to us, that their intelligence had been vastly underestimated, and that even a grasshopper, observed closely, has its own musical tastes.
