There has been a dramatic evolution of peace & justice activism over the past century, often pioneered by a Quaker organization called the AFSC. Author Gregory Barnes chronicles the ins-and-outs of that growth & change in his book, A Centennial History of the American Friends Service Committee (see a review in Friends Journal here). blazing the path in terms of conscientious objection, non-proselytizing aid, affirmative action, loving the "enemy", and much more.