You don't believe in Nature anymore. It's too isolated from you. You've abstracted it. It's so messy and damaged and sad. Your eyes glaze as you travel life's highway past all the crushed animals and the Big Gulp cups.
Nature
Our treatment of animals and our attitude toward them are crucial not only to any pretensions we have to ethical behavior but the humankind's intellectual and moral evolution. Which is how the human animal is meant to evolve, isn't it?