This is something I struggle with, as I'm an environmental scientist and keenly aware of the state of our environment. Layer increasing resource and food scarcity, and the implacable orphan crushing machine of capitalism, and the picture is bleak.
I am one man, and I can only do so much. The problem is so unfathomably big and complex how can anyone hope to fix it? Any one. That's the issue. We're so used to thinking individually and that we are powerless apes in the experiment of our cruel masters. However, apes strong together.
It's easy to despair; hope takes courage. Hope is stubbornness in the face of adversity. Hope is rebellion.