White poppies are worn by pacifists to symbolize peace and non-violence. They were introduced in 1933 by the Women's Co-operative Guild to remember all victims of war, not just those who died fighting. The white poppy represents a commitment to peaceful solutions to conflict without resorting to war or violence. It is often worn alongside the red poppy, which represents remembrance of those who died in war. Some people wear both to show respect for military sacrifice while promoting peace.