The author analyses the changes in thinking since the early 20th century, when people were more concerned about protecting nature, up until the current day, when the aim is to manage biodiversity. The recent radical changes in how science looks at nature reflect a similar paradigm change. The idea of a natural balance was for a long time the dominant principle in terms of ecology. However, the most widely held principle today is that of constant change, which calls for an ethical debate: how can we rethink the values on which relations between man and nature are founded, given that biodiversity is part of a process? The author begins by looking at the resulting changes in how researchers are choosing to work.
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