Book excerpt: During the 1960s and 1970s, rapidly growing environmental awareness and concern created unprecedented demand for ecological expertise and novel challenges for ecological advocacy groups such as the International Union for Conservation of Nature and Natural Resources (IUCN). This book reveals how, despite their vast scientific knowledge and their attempts to incorporate socially relevant themes, IUCN experts inevitably struggled to make global schemes for nature conservation a central concern for UNESCO, UNEP and other intergovernmental organizations.