___ (1931-2005) was an American nun and environmental activist who worked tirelessly to protect the Brazilian rainforests and the indigenous inhabitants from destruction. She was killed by a rancher who was recently convicted for the crime.

Peace studies is an interdisciplinary academic field that draws on political science, sociology, history, anthropology, theology, psychology, philosophy, and other fields to:

understand the causes of armed conflict;
develop ways to prevent and resolve war, genocide, terrorism, gross violations of human rights; and
build peaceful and just systems and societies.