Geoffrey Moore
Author and consultant. Best known for Crossing the Chasm (1991, ~1M copies sold), the foundational B2B go-to-market text. Follow-up books include Inside the Tornado, The Gorilla Game, Dealing with Darwin, and The Infinite Staircase (on ethics and the secular basis for traditional values). Originally an English major; spent formative years at Regis McKenna, the premier high-tech marketing agency of the 1980s, where he observed the recurring pattern of early-adoption success followed by sudden stalling — the phenomenon that became Crossing the Chasm. Now an author, speaker, and venture advisor.
Known for the Technology Adoption Lifecycle framework, the beachhead and bowling alley metaphors, the chasm concept, and the four-playbook model mapping go-to-market strategy to lifecycle stage.