“Germ warfare against the United States would escalate to war against all humanity.”

Conclusion
1880s, Personal Memoirs of General U. S. Grant (1885)
Context: The cause of the great War of the Rebellion against the United States will have to be attributed to slavery. For some years before the war began it was a trite saying among some politicians that 'A state half slave and half free cannot exist.' All must become slave or all free, or the state will go down. I took no part myself in any such view of the case at the time, but since the war is over, reviewing the whole question, I have come to the conclusion that the saying is quite true.

Speech (1860)

Commencement address at Lindsey Wilson College (14 May 2005) http://www.lindsey.edu/index.cgi?id=10379.
Context: The line that connects the bombing of civilian populations to the mountain removed by strip mining … to the tortured prisoner seems to run pretty straight. We're living, it seems, in the culmination of a long warfare — warfare against human beings, other creatures and the Earth itself.

Killing Hope: US Military and CIA Interventions Since World War II, Chapter 30. Cuba 1959 to 1980s: The unforgivable revolution

Budget speech http://hansard.millbanksystems.com/commons/1909/apr/29/final-balance-sheet in the House of Commons (29 April 1909)
Chancellor of the Exchequer
Context: This, Mr. Emmot, is a war Budget. It is for raising money to wage implacable warfare against poverty and squalidness. I cannot help hoping and believing that before this generation has passed away, we shall have advanced a great step towards that good time, when poverty, and the wretchedness and human degradation which always follows in its camp, will be as remote to the people of this country as the wolves which once infested its forests.

As quoted in "Timothy McVeigh & Terry Nichols: Oklahoma Bombing" (2010), TruTv.

Last public speech before his death, Chicago, Illinois (1 May 1861)
1860s