With the January 2021 publication of the second volume of Whitehead’s Harvard lectures as The Harvard Lectures of Alfred North Whitehead, 1925–1927: General Metaphysical Problems of Science (HL2), scholars now have access to the laboratory of Whitehead’s classroom for his second and third years in America, from the time just after the publication of his Science and the Modern World, through his delivery of the 1926 Lowell lectures that would become Religion in the Making, and up to his delivery of the Barbour-Page lectures that would become Symbolism: Its Meaning and Effect.