Good Question:)
POSSIBLE!
1)I->By being Peaceful within(yourself) ...(i must learn to be PEACE on my actions and thoughts)
2)ME->Acknowledging people's hearts about peace existence within them... (Making people realize/accept truth PEACE is within them by LOVE)
3)WE->Practice YOGA, make it a part of our everyday life helps Balancing of body and Meditation helps connect to the truth of universe...this lead to a peaceful life..
YES WE CAN MAKE THE WORLD A BETTER PLACE..Staring from WE+ME='I'
DOMINIK0488