“Charles Darwin and his followers have shown how all life on the planet evolved from a single source. The mechanism they call evolution by natural selection means competition, extinction and the emergence of new life forms without the need for a director or conductor. The Creator shimmers and vanishes like a mirage.” So says political pundit Andrew Marr, one of the BBC’s most senior journalists, in the first of his three BBC2 programmes celebrating evolution and its legacy during the last century and a half. While there was much to agree with in this thought-provoking series, Marr is careful to...