It’s too ambitious to fix the world. I don’t know that any one person can. I’m not sure what ‘fix’ even means. Many things are right about the world, and many things are wrong. You make the world a better place by being the best person you can be, accomplishing as much as you can, and as much as interests you, and living a good life. Make your goal ‘fixing MY world’ rather than fixing ‘THE’ world.