A Sermon of the Mexican War: Preached at the Melodeon on Sunday June 25th 1848, by Theodore Parker, Minister of the XXVIII, Congregational Church in Boston.

Renowned abolitionist and Congregationalist minister Theodore Parker delivers a sermon to his Boston congregation following the ratification of the Treaty of Guadalupe Hidalgo by the Mexican Congress. Parker estimates the cost of the war both in men and material and admonishes the volunteer troops for the atrocities they committed during the war. Parker warns his audience against a growing national appetite for territorial expansion and the spread of slavery. He also condemns U.S. political leaders for advocating the war, the business community for their avarice during the war, and ordinary citizens for their complacency throughout.