What metaphors are used in The Metaphysical Club: A Story of Ideas in America by Louis Menand?

Second Great Awakening: It began in New England at the turn of the 19th Century. A Protestant revivalism mixed anti-institutionalism, folklore, Christianity, and superstition together. It created a democratized, non-hierarchical religion based on American culture, and protestant spiritualism. It was the last supernatural trend before science took over as the main way of thinking and pushed religion into the background.