During the 13th Triennial Congress of the Women’s International League for Peace and Freedom (WILPF), 23-28 July 1956 in Birmingham, England, WILPF stated in a resolution that taking the life of a human being should be declared a crime against humanity:
- Whether it be done by a private individual against another person,
- Whether it be done by a State against one of its citizens or another person within its jurisdiction,
- Whether it be done by a government ordering its citizens to kill citizens of another State (war) or between citizens of the same State.