The lack of urgent action to reverse biodiversity loss is partly due to the complex nature of biodiversity as a feature of our planet. Subsequently, policymakers receive an often-confusing variety of narratives on why biodiversity matters, which makes it difficult to link biodiversity loss and risks to the attainment of sustainable development. Making this link clearer calls for a multidimensional perspective on biodiversity to reassess what we value, facilitate mainstreaming and support national decision-making. We propose a co-produced Multidimensional Biodiversity Index to connect biodiversity science to the political agenda that accounts for the diversity of values underpinning nature–human relationships.