Shifting from brain ageing to brain longevity

Nature Human Behaviour, Published online: 06 April 2026; doi:10.1038/s41562-026-02441-4 Population ageing is too often framed as decline. Drawing on neuroscience and behavioural science, this Comment calls for a shift from brain ageing to brain longevity and argues that brain capital should be treated as a policy and governance priority to support resilient institutions and sustainable economies.