Tim Christophersen had a UN contract running to 2038. Diplomatic passport. Lifetime security. A ringside seat to every major environmental agreement on the planet. He left. That decision tells you something important about where this man thinks the real leverage is — and where it isn't. He's spent 30 years building the architecture the world runs on: the UN Decade on Ecosystem Restoration, the global biodiversity framework, the early scaffolding of nature markets. He's written one of the form...