Well, I have a new idea.... hope that this is new.... Here is how my moral system works:
Make three players.
Player 1 and 3 is with 500 stone (it is the moral of our soldiers.)
Player 3 is our enemy, while player two is our ally.

With each died player 1 soldier, we tribute 10 stones to gaia, while Player 2 gains 10 food and tributes 10 wood to gaia, Player three gains 10 stone. And whith each died player 3 soldier, he tributes 10 stone to gaia, while Player two gains 10 woodm tributes 10 food to gaia, and player 1 gains 10 stone. When player 2 gains 500 food, player 1 soldiers lose their morale, and begin to running. The same will be with player 3, only if player 2 gained 500 wood.

I can say that 10 wood = 10 stone of player 3, and 10 food = 10 stone of player 1.

Well, how do you like my moral idea?