Eglantyne Jebb was the first person to demand that states protect children, impelling the Convention on the Rights of the Child, which was adopted by the United Nations in 1989 and ratified by almost all nations around the globe, thanks to the pioneering work of Eglantyne Jebb.
“All wars, just or unjust, disastrous or victorious are waged against the child.” Eglantyne Jebb

If you would like to learn more about Eglantyne Jebb, you can consult his biography:
Eglantyne Jebb(pdf)