I get satisfaction out of seeing stuff that makes real change in the real world. We need a lot more of that and a lot less abstract stuff.
A treatment method or an educational method that will work for one child may...
You do have to change things as warfare changes.
My grandmother was the greatest cook in the world. She could just go in there the whole kitchen would look like a tornado hit it and then she'd come out with the best food. Then she'd sit at the table and she wouldn't eat!