What is the author's tone in The Demon-Haunted World by Carl Sagan?

The author's tone is one of cautious optimism about the future of science and the ability of non-scientists to appreciate the beauty and necessity of rational, logical, scientific thinking. Despite his meticulous lambasting of popular fads and follies, such as the superstitions of the New Age, Sagan retains a sense of humor about the "extraordinary popular delusions" of the masses while also sounding an alarm for the human race.