Which war is most closely associated with the
emergence of the united states as a world power?
(1) war of 1812
(2) mexican war
(3) civil war
(4) spanish-american war

its main object was the establishment of "settlement houses" in poor urban areas, in which volunteer middle-class "settlement workers" would live, hoping to share knowledge and culture with, and alleviate the poverty of, their low-income neighbors.