Social injustice
For most of us, it our privilege to be ignorant. Our routines and comforts help us with that. Slavery is stitched into our clothes we put on in the morning. Whenever we walk to school or work, we don't think about the disabled and diseased people who cannot walk. While we eat our lavish dinner poverty is killing children around the world. And when we go to sleep, we do not dream of people without shelter and fluffy pillows.
No, we only remember these things when we must deal with it ourselves.
So imagine that you were in a position of power to change some of these things. How would you change it?