In 1855 Stone married Henry B. Blackwell, a man also active in the anti-slavery movement. During the marriage service they pledge that both partners would have absolutely equal rights in marriage. In protest against the laws that discriminated against women, Stone retained her own name.
Her daughter, Alice Stone Blackwell, edited the Woman's Journal for 35 years. Lucy's last words to her daughter were "make the world better". Lucy Stone died in Dorchester, Massachusetts, on 18th October, 1893.
(1) In 1846 Lucy Stone told her family that she intended to campaign for sexual equality. Her sister, Sarah Stone, wrote to her about this decision on 28th November 1846.
I don't know as I was very much surprised at the content of your letter. I have half-believed for a long time that you were preparing for a public speaker, though I hoped I might be mistaken. Not that I think I wrong in itself, but because I think it an employment a great many grades below I think it an employment a great many grades below, what I believe my only and dearly loved sister qualified to engage in. I don't hardly know what you mean by "laboring for the restoration and salvation of our sex" but I conclude you mean a salvation from some thralldom imposed by man. Now my sister I don't believe woman is groaning under half so heavy a yoke of bondage as you imagine. I am sure I do not feel burdened by anything man has laid upon me, be sure I can't vote, but what care I for that, I would not if I could. I know there is a distinction made in the wages of males and females when they perform the same labor, this I think is unjust, and it is the only thing in which woman is oppressed, that I know of, but women have no one to blame, but themselves in this matter. If as a general thing they had qualified themselves, as men have they would command the same price, but they have not, and the few who have are obliged to suffer on that account. I think my sister if you would spend the remainder of your life in educating our sex, you would do afar greater good than you will if you spend your noble energies in forever hurling "back the insults and indignities that men heap upon us." This I am sure you can never do "by the grace of God" for it is entirely contrary to his spirit and teachings. My sister commit your ways unto the Lord, and he will direct your steps.