My wife and I just got finished posing the "learning" game and it brought up an interesting question.
With the gunpowder tech it says you can spend any 2 resource to destroy a building. My wife, who had stockpiled several resources from huts and villages, was able to destroy a building every turn for 2 or e turns and would have been able to continue with her scouts on times with resource generators. This seemed oddly strong since it appear to mean either one city loses all buildings, or one city loses all production since it has to keep rebuilding the same building every turn. Are we understanding how that tech works correctly?
That sounds about right.
Note, however, that if your wife wanted to keep going, it would take TWO city actions every turn to harvest resources, so you would likely come out ahead.