Richard Dawkins shares what prompted him to write his bestselling book The God Delusion, which has sold over 3 million copies since its publication in 2006.

Watch the full Big Conversation between Richard Dawkins & Francis Collins: https://youtu.be/SQ3EU58AzFs
 
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The Big Conversation is a video series from Unbelievable? featuring world-classthinkers across the religious and non-religious community. Exploring science, faith, philosophy and what it means to be human. The Big Conversation isproduced by Premier in partnership with John Templeton Foundation.

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