Originally posted by Zouave
Assuming you're not being ironic, EDIT UP the frequency of strategic resources, esp. coal and iron, and make their disappearance less likely.
Firaxis' values are absurd and unreal. Iron NEVER was that hard to find. I have it at 177, for example.
Tweak and try different values. Resources should be rare but not ridiculously rare. Check with some geography books.
And after you've done that and corrected Firaxis' stupid resource values, you can also Edit up post-gunpowder military units' strengths.
Go see the mod I left on the other forum for examples.