I remember when I was a kid, maybe 12-13, I was sad at the state of the world, and I vowed I would never stop looking for a way to make the world a better place. I am happy to say I have never stopped looking.
That is quite inspiring. I am sure as kids we all looked at something and wanted to change it for the better. The key here would be to not giving up. Growing up life happens and we all get selfish and over time we start not caring about the state of the world anymore.
Of course over time I came to realize it was an impossible goal for the likes of me, but still, I am as committed today some thirty plus years later as I was back then. After all, the only way it would really be impossible is if I didn't try.
I think you can change the world even if it is done bit by bit. One little step is a huge step forward. We can all contribute different things to the world and we should be proud of the progress we make.