Heres my two cents:
I like to play the game like if it was real, like I am actually a ruler of a real nation in a parallel digital universe (think matrix..sorta), I enjoy the game more that way and my therapist tells me its good for my condition
. Although the unpreditable AI leaders sometimes ruins the fun, so I just pretend everyone is crazy except me.
So after many hours of consulting my digital advisers, especially AL (his my military advisor and my best friend
), my policy for the use of nukes is quite simple (these were formulated with the assumption once I use nuclear weapons, everyone will declare war on me use their nukes against me):
1. Retaliation - Nuke me (regardless the scale of the attack) - I (try) nuke EVERYONE to the ground
2. The total defeat of my nation is unavoidable - Nuke EVERYONE to the ground.
When I nuke, there is no half measure, its all or nothing. If I use nukes, I try and make sure there is no one left to nuke me back.
As you can see once in the modern age, I spend a great deal of resources on stockpiling nukes, rarely have I ever unleashed my stockpile of nukes, but in the times that I have, it was bye bye to everyone, including me. (a few of those were in mutiplayer games, ppl weren't very happy with me afterwards, I believe some even went as far as questioning my sexual preference and commenting on my mother's sex life)