Arizona Daily Star: The Defenders of Wildlife, like many environmental groups, is dedicated to the philosophy of the late biologist Aldo Leopold – that “saving all the parts” of the world’s ecosystems is the foundation of conservation. “To keep every cog and wheel is the first precaution of intelligent tinkering,” Leopold wrote in his classic 1940s essay “Round River.” Those words became part of the foundation of the modern environmental movement. So when Defenders …