Why Do We Age? Two Perspectives on a Fundamental Question
Why do we age? In Ageing Research Reviews, Peter V. Lidsky and Mikolaj Ogrodnik approach one of the fundamental questions in ageing research from two very different perspectives.
The damage-driven view sees ageing as the consequence of imperfect maintenance: damage accumulates in our cells and tissues over time until function begins to decline. Programmed ageing theories propose that ageing may be an evolved biological programme that actively limits lifespan. Once largely dismissed on evolutionary grounds, new observations have brought this idea back into serious scientific discussion.
After presenting the evidence for both perspectives, Lidsky and Ogrodnik put them to the same fundamental questions, like: If life has persisted for billions of years through mechanisms that repair, remove or reset biological damage across generations why can individual organisms not achieve the same?
The distinction matters. If ageing is predominantly accumulated damage, preventing damage and improving repair may be the way forward. If biological programmes actively drive ageing, those programmes themselves could become targets. So before asking if and how we can live longer, we first need to understand: why do we age at all?
