Build Walls From Start of Exploration Age

In my first vanilla game, I was baffled to discover that I could no longer build ancient walls (or any walls!) after transitioning to the Exploration Age. That took me out of the game enough that I spent a few afternoons figuring out how to fix it. This mod fixes the problem by removing the tech unlock for Medieval Walls from the Castles technology. No other changes were made. And now that that's done, I figured I would leave it here in case you are like me and think it's ridiculous for your civ to suddenly forget how to build walls. INSTALLATION Simply extract the contents of the zip file and copy them into your mods folder. On Windows, you can find it at c:/Users/{username}/AppData/Local/Firaxis Games/Sid Meier's Civilization VII/Mods Enjoy