Host Gregory Treat examines how John Churchill, the first Duke of Marlborough, built one of Britain's most enduring aristocratic dynasties — not merely through battlefield brilliance, but through a pioneering mastery of military finance. Gregory introduces the concept of "aristocratic technology" — a domain skill so complex and high-stakes that it requires multi-generational cultivation — and traces how the Churchill-Spencer family wielded financial acumen as their core technology for over 400 years.