The winner of the annual Nobel Peace Prize is set to be announced on Friday. The title has been bestowed upon U.S. presidents Barack Obama and Jimmy Carter, activists Wangari Maathai and Malala Yousafzai—who won in 2014 alongside Kailash Satyarthi for their work “against the suppression of children and young people and for the right of all children to education”—and organizations such as Doctors Without Borders and the World Food Programme.