Motherhood and International Peace

In 1912, 'Abdu'l-Baha called for women's right to vote, which was not fully established in the United States until 1920 (see article here). He said that peace will be achieved because mothers will refuse to lose their sons to war.

The most momentous question of this day is international peace and arbitration, and universal peace is impossible without universal suffrage. Children are educated by the women. The mother bears the troubles and anxieties of rearing the child, undergoes the ordeal of its birth and training. Therefore, it is most difficult for mothers to send to the battlefield those upon whom they have lavished such love and care. Consider a son reared and trained twenty years by a devoted mother. What sleepless nights and restless, anxious days she has spent! Having brought him through dangers and difficulties to the age of maturity, how agonizing then to sacrifice him upon the battlefield! Therefore, the mothers will not sanction war nor be satisfied with it. So it will come to pass that when women participate fully and equally in the affairs of the world, when they enter confidently and capably the great arena of laws and politics, war will cease; for woman will be the obstacle and hindrance to it. This is true and without doubt. 

'Abdu'l-Baha, Promulgation of Universal Peace