A wonderful thing happens when you give up on hope, which is that you realize you never needed it in the first place. You realize that giving up on hope doesn't kill you, nor did it make you less effective. In fact it made you more effective, because you ceased relying on someone or something else to solve your problems - you ceased hoping your problems somehow get solved, through the magical assistance of God, the Great Mother, the Sierra Club, valiant tree-sitters, brave salmon, or even the Earth itself - and you just began doing what's necessary to solve your problems yourself.