What is conservation?

Last week I gave an introductory undergraduate lecture about conservation, which forced me to spend some time thinking about how to define what it is. This is more difficult than it perhaps should be – ‘conservation’ is a word that seems to make sense on an intuitive level (I feel that I know it when I see it), but stubbornly resists attempts to be wrestled into a clear definition. In the end I came up with a new definition, but was left wondering whether the scope of ideas and activities that fit within this definition have moved on beyond the usefulness of the term ‘conservation’ itself. This post is an attempt to explain why. Continue reading