Things really heat up when the World Congress begins to meet and vote on global proposals. It lends an interesting dynamic to these exchanges: the gold generated might be more than offset by the way trade opens the door to religious and cultural influence and gives less technologically advanced civilizations a bonus to their research, helping them catch up to you. But that’s not the only thing they carry: trade routes also spread religion between cities, and make each side of the trade relationship more susceptible to tourism influence. For instance, caravans and cargo ships now ply the trade lanes between empires, generating gold and extra research for both civilizations.

In fact, everything in Brave New World pushes towards the direction of having more interaction between civs, of broadening the context for strategic decision-making. Instead of a bunch of civs slowly gliding toward the culmination of their chosen strategies - with only the Conquest civs choosing to fight wars - the finale of a Brave New World game is much less predictable, and 10 times more exciting, because there are so many more points of conflict. These two factors change the endgame tremendously. Let's see how the French feel about their own cultural achievements when my nation of artists and writers start carpet-bombing Paris. But the bottom line is simple: culture-weak civs are easy prey for tourist influence, but culturally strong ones can be an insurmountable roadblock to the culture victory … unless something bad were to happen to them. You’ll be glad I explained it that way, because Civilopedia is so inscrutable on this point that I think the Sphinx must have written it. And when all of the civs have fallen under the spell of your music, paintings, and literature, you get the culture victory. Once you cross a certain ratio of tourism-to-culture, the other civilization falls under your influence. In a nutshell, culture still unlocks policies as before, but most cultural buildings have sockets in them where Great Artists, Musicians, and Writers can place Great Works, generating tourism that slowly earns you influence over the other civs.

Brave New World fixes this with the concept of tourism.

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