Book excerpt: Humans are the most inquisitive, emotional, imaginative, aggressive and baffling animals on the planet. But how well do we really know ourselves? How to Be Animal offers a radical take on what it means to be human and argues that at the heart of our psychology is a profound struggle with being animal. Tracing the history of this thinking through to its far-reaching effects on our lives, and drawing on a range of disciplines, Challenger proposes that being an animal is a process, beautiful and unpredictable, and that we have a chance to tell ourselves a new story; to realise that if we matter, so does everything else.