“I don’t oppose all wars. What I am opposed to is a dumb war. What I am opposed to is a rash war. What I am opposed to is the cynical attempt by Richard Perle and Paul Wolfowitz and other armchair, weekend warriors in this administration to shove their own ideological agendas down our throats, irrespective of the costs in lives lost and in hardships borne. What I am opposed to is the attempt by political hacks like Karl Rove to distract us from a rise in the uninsured, a rise in the poverty rate, a drop in the median income, to distract us from corporate scandals and a stock market that has just gone through the worst month since the Great Depression. That’s what I’m opposed to. A dumb war. A rash war. A war based not on reason but on passion, not on principle but on politics.”

On Protracted Warfare (1938)

On Protracted Warfare (1938)
Original: (zh-CN) 历史上的战争分为两类，一类是正义的，一类是非正义的。一切进步的战争都是正义的，一切阻碍进步的战争都是非正义的。我们共产党人反对一切阻碍进步的非正义的战争，但是不反对进步的正义的战争。对于后一类战争，我们共产党人不但不反对，而且积极地参加。前一类战争，例如第一次世界大战，双方都是为着帝国主义利益而战，所以全世界的共产党人坚决地反对那一次战争。反对的方法，在战争未爆发前，极力阻止其爆发；既爆发后，只要有可能，就用战争反对战争，用正义战争反对非正义战争。

Rzeczpospolita interview (March 2005)

Jeremy Corbyn row after 'I'd not fire nuclear weapons' comment https://www.bbc.co.uk/news/uk-politics-34399565, BBC News, 30 September 2015
2010s, 2015

Presidential campaign (April 12, 2015 – 2016), Speech in Warren, Michigan (August 11, 2016)
Context: I will stop any trade deal that kills jobs or holds down wages – including the. I oppose it now, I’ll oppose it after the election, and I’ll oppose it as President.... I will stand up to China and anyone else who tries to take advantage of American workers and companies. And I’m going to ramp up enforcement by appointing, for the first time, a chief trade prosecutor, I will triple the number of enforcement officers, and when countries break the rules, we won't hesitate to impose targeted tariffs.

Debating Linus Pauling, in The Nuclear Bomb Tests...Is Fallout Overrated? : Fallout and Disarmament KQED-TV, San Francisco (20 February 1958) http://osulibrary.oregonstate.edu/specialcollections/coll/pauling/peace/papers/1958p2.1.html
Context: I don't want to kill anybody. I am passionately opposed to killing, but I'm even more passionately fond of freedom. The freedom of Dr. Pauling and of myself expressing our opinions freely on any subject, however broad, however far removed of our proper competence, but particularly, to be able to express our opinions in the fields we really know; this would not be possible in Russia.

Views on civil rights declared in the summer of 1938, quoted in Justice for All : Earl Warren and the Nation He Made (2006) by Jim Newton, p. 95
Context: I am unalterably opposed to any species of vigilantes or to any other extra-legal means of a majority exercising its will over a minority … I believe that if majorities are entitled to have their civil rights protected they should be willing to fight for the same rights to minorities no matter how violently they disagree with their views. Further, I am convinced that this is the only way they can be preserved.
I believe that the American concept of civil rights should include not only an observance of our Constitutional Bill of Rights, but also absence of arbitrary action by government in every field.

A 1973 Interview with Milton Friedman – Playboy Magazine
“Interview with Milton Friedman”, Playboy magazine (Feb. 1973)

Source: The Bhagavadgītā (1973), p. 163. (32.)