Culture, trade and diplomacy are to become more important in Civilization 5 with Brave New World, the second expansion pack, announced today by publisher 2K Games. Arriving this summer, it'll bring a new culture victory condition, international trade routes, the new World Congress, and heaps more.

Overlords will be able to achieve a cultural victory by being the world's dominant culture, exerting a majority influence on every other civilization. To help along this way, you'll be able to place masterpiece works to display in certain buildings, and scour battlegrounds and ruins with archaeologists.

If you fancy a diplomatic victory, you'll want to get stuck into the World Congress, where civilizations can vote and pass resolutions on everything from host cities for the World Games to nuclear weapons and sanctioning "rogue nations." Canny folks can trade their votes too.

Which leads to trade routes, which help your civilization run and expand smoothly while spreading religion, cultural influence, and science along their path.

The spotted listings for a 'One World' expansion weren't too far off, then.

Brave New World also introduces eight new Wonders, two new scenarios, and nine new civilizations, each with their own new units and buildings. Hit the official website for more details.