Richard Dawkins asks why human beings exist at all, and argues that religion answers the question badly while evolutionary biology answers it well. He walks through Darwin's theory of natural selection as the explanation for human origins, treating it not as one option among many but, in his view, the only serious account available. Dawkins takes on the common religious objection that evolution reduces humans to "just another animal," agreeing with the premise but rejecting the conclusion: being one species among many does not rule out being unusual, and he points to the human capacity to ask a question like this one as evidence of that. He closes on the idea that this same capacity brings responsibility along with it. The film is a short, direct lecture, Dawkins alone making an argument rather than a wide survey, aimed at viewers already familiar with the evolution-versus-creation debate.