I don't think we're yet evolved to the point where we're clever enough to handle a complex a situation as climate change. The inertia of humans is so huge that you can't really do anything meaningful.
If it hadn't been for the Cold War neither Russia nor America would have...
You do have to change things as warfare changes.
The best sermon is preached by the minister who has a sermon to preach and not by the man who has to preach a sermon.