The Animal and the Thinker: Instinct, Reason and the Dance of Our Divided Selves

The big questions of our lives bring fierce debates. Right and wrong. Freedom and responsibility. Women and men. Democracy and justice. Ambition and fulfilment. Where do answers lie in a mind that produces the many sides and needs of humanity?In The Animal and the Thinker, pioneering neuroscientist John Duncan lays out the principles, strengths and weaknesses of two sides of ourselves. One side follows the principles of instinctive animal behaviour. It is elaborate, sophisticated, conflicted yet essential - without it, our life would have no meaning. On the other side is our rational brain. It generates an infinite world of new ideas, but often, its need for focus generates sterile social beliefs and destructive culture wars. Our rational side is brilliant, but often, it is wrong. For thousands of years, writers, thinkers and philosophers have seen human life as a war between Dr Jekyll and Mr Hyde. Duncan shows that there is no war. To bring humanity and reality to the great, conflicted questions of our lives, we need the dance between these two essential sides of ourselves.

Why are we so often in conflict—arguing with ourselves and with others, uncertain over who we are and what we need from our lives?

In The Animal and The Thinker, the world-leading, pioneering neuroscientist John Duncan explains that each of us is not just one person – we are two. On one side are our animal instincts, built on the sophisticated needs of human life through evolution, but struggling to navigate the complexity of modern life. On the other side is our rational brain which calculates and cogitates, but is often helpless in the face of bigger questions of meaning and purpose.

Dovetailing these two competing sides of ourselves, Duncan draws on a lifetime’s pioneering work to attack puzzles that have concerned thinkers, writers and philosophers through human history. Right and wrong. Freedom and responsibility. Women and men. Democracy and justice. Ambition and fulfilment. Understanding how these two sides of ourselves interact offers revealing and often surprising answers to some of the great questions of our lives.

Discover a new perspective on human behaviour, and learn how we can better understand ourselves, our struggles, and our search for meaning.

• | Author: John Duncan
• | Publisher: Ebury Publishing
• | Publication Date: Jul 10, 2025
• | Number of Pages:
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• | Binding: Hardback
• | ISBN-13: 9780753560921
• | ISBN-10: 0753560925