On one hand, knowing others are in pain and knowing injustice should mean we are not at peace.
My increased confidence in my own self-reliance gives me hope that others can also solve their own problems too... so with that rationalization, I can find peace, and see the suffering of others as their path to self-reliance, their path to inner strength.
The serenity prayer, do what you can, then let go.
People are part of nature too.
Peace is found with the mindset- it's not personal attacks, it's just the laws of nature. Predators eating prey. The trick is analyzing our own natural behaviors and experimenting with different interaction techniques.