I don't see how dropping herbicide on poppy crops will wipe out anything except the crops.

Two words: Agent Orange.

'Sides, you'll have to provide the farmer with something else to grow - and prevent the local warlords from killing him when he stops growing poppy - otherwise he'll just re-plant his field next year. Or starve to death. Or get killed by goons for not delivering his quota of poppy. That is not how you win hearts and minds.

- Jake

If you only spend 20 minutes of the rest of your life on economics, go spend them here.