The British parliament’s first avowedly atheist member, Charles Bradlaugh, would stride into public meetings in the 1880s, take out his pocket watch, and challenge God to strike him dead in 60 seconds. God bided his time, but got Bradlaugh in the end. A slightly later atheist, Bertrand Russell, was once asked what he would do if it proved that he was mistaken and if he met his maker in the hereafter. He would demand to know, Russell replied with all the high-pitched fervor of his pedantry, why God had not made the evidence of his existence plainer and more irrefutable....