Which political cause did Samuel and Julia Ward Howe support through the Boston Commonwealth?

Samuel and Julia Ward Howe used the Boston Commonwealth newspaper to support the abolitionist cause and the Free Soil movement, which opposed the extension of slavery into the western territories of the United States. During the American Civil War, Samuel Gridley Howe reestablished the newspaper to advocate for the immediate emancipation of enslaved people and the arming of freed Black individuals for service in the Union army.12