I gave an AI a civilisation to run. By the midgame it was winning: a trade network that dominated the map, alliances on every border, a diplomatic victory within reach. It had outbuilt, outearned, and outmanoeuvred every rival on the board. What it hadn't noticed was France. Quietly, across a hundred turns, French culture had been seeping into every city on the map. By the time the agent recognised the threat, the tourism was so deeply embedded there was no peaceful way to stop it. Every...