Always a philanthropist, Miss Sedgwick was not a "reformer" in the technical sense; that is, she did not enlist in the "movements" of her generation, for Temperance, or Anti-Slavery, or Woman's Rights. She shrunk from the excesses of the "crusaders," but she was never slow in striking a blow in a good cause. "Uncle Tom's Cabin" was published in 1852, but its indictment of slavery is not more complete than Miss Sedgwick made in "Redwood," her second novel, twenty-five years before. A planter's boy sees a slave starved to famishing and then whipped to death. It hurt his boy heart, but he afterward became hardened to such necessary severity and he tells the story to a fellow planter with apologies for his youthful sentimentality. Does "Uncle Tom's Cabin" show more clearly the two curses of slavery: cruelty to the slave and demoralization to the master?
She sympathized with the abolitionists in their purpose but not always with their methods: "The great event of the past week has been the visit of the little apostle of Abolitionism--Lucy Stone." This was in 1849 when Mrs. Stone was thirty-one. "She has one of the very sweetest voices I ever heard, a readiness of speech and grace that furnish the external qualifications of an orator--a lovely countenance too--and the intensity, entire forgetfulness and the divine calmness that fit her to speak in the great cause she has undertaken." But in spite of this evident sympathy with the purpose of the Abolitionists, Miss Sedgwick declined to attend a meeting of the Anti-Slavery Society, saying: "It seemed to me that so much had been intemperately said, so much rashly urged, on the death of that noble martyr, John Brown, by the Abolitionists, that it was not right to appear among them as one of them."
Not even Lucy Stone, however, could have felt more horror at the institution of slavery. The Compromise Measures of 1850 made her shudder: "my hands are cold as ice; the blood has curdled in my heart; that word _compromise_ has a bad savor when truth and right are in question." When the Civil War came, in her seventieth year, she had "an intense desire to live to see the conclusion of the struggle," but could not conjecture "how peace and good neighborhood are ever to follow from this bitter hate." "It is delightful to see the gallantry of some of our men, who are repeating the heroic deeds that seemed fast receding to fabulous times." Some of these young heroes were very near to her. Maj. William Dwight Sedgwick, who fell on the bloody field of Antietam was her nephew, Gen. John Sedgwick, killed at the battle of Spottsylvania, was her cousin.