Abstract
Everyone is familiar with the term " biodiversity ". But what does this apparently simple term actually mean? We hear it over and over again: " biodiversity is in crisis ". Are we on the verge of a sixth extinction, with ourselves as the cause ? What can we learn from the crises of the Earth's geological past ? Can we still turn things around ? What are our levers for action ? Wouldn't the real question be ethics, ethics for the planet ?