1. Boost production across the board, cut production cost for everything past renaissance era. It's two years overdue already. 2. Limit the rate with which global warming escalates, and cut down the impact military units and railroads (seriously?) has on global warming. As others have said, it goes from zero to max before you can even get a single flood barrier up. 3. Look into why AI has suddenly stopped building wonders. Most of the wonders sit unbuild 2-3 eras later, if the player doesn't grab them.