Are zoos an anachronism in the 21st century when we can watch animals in their natural habitat, close-up from our couches without worrying about cruelty? Should they go the way of other bygone era 'spectacles' and 'attractions' that we now regard as barbaric? There are vocal campaigners and activists who believe so.

Heather Browning and Walter Veit disagree, but they acknowledge there is a case to be answered. In What are Zoos for? they test the common justifications for zoos (entertainment, education, research, conservation) against the evidence and suggest what the best zoos of the future should look like to ensure that they are primarily for animals and not just for people.