We are living through what scientists call the sixth mass extinction — an event driven not by asteroid impact or volcanic eruption but by human activity. Species are disappearing at rates up to 1,000 times higher than natural background levels, driven primarily by habitat destruction, agricultural expansion, pollution, and climate change. The consequences extend far beyond the loss of individual species. Biodiversity underpins ecosystem services — the natural processes upon which all human life depends: pollination, water purification, soil fertility, flood regulation, and climate stability. The case for protecting biodiversity is simultaneously ecological, economic, and ethical. Do species have intrinsic value — worth protecting regardless of their utility to humans? Or is the biodiversity crisis primarily a risk management problem for human civilisation? How we answer that question will shape what we are willing to do about it.

💡 Did you know? When wolves were reintroduced to Yellowstone in 1995, their presence changed the behaviour of deer, which stopped grazing riverbanks, allowing trees and plants to recover — which stabilised riverbanks and changed the course of rivers. One species changed the physical geography of the park.