Regarding US conquest of the Philippines:
"I turn green in bed at midnight if I think of the horror of a year's warfare in the Philippines [...] We must slaughter a million or two foolish Malays in order to give them the comforts of flannel petticoats and electric railways."
Letter to Elizabeth Cameron (22 January 1899), in J. C. Levinson et al. eds., The Letters of Henry Adams, Volume IV: 1892–1899 (Cambridge, MA: Belknap Press, 1988), p. 670