Jim was passionate about our planet’s wild places, particularly through leading IUCN’s work on natural World Heritage (WH) under the UNESCO WH Convention from 1983 to 1998. He set the benchmark for quality for natural WH sites. This put him in the hot seat when IUCN recommendations went against national interests but he always stood firm. Jim was happiest in the field talking to park managers. He had a wicked wit, always ready to joke and drink with friends. His legacy for nature will live on.