extremism (n.)youdaoicibaDictYouDict[extremism 词源字典]
"disposition to go to extremes in doctrine or practice," 1848, from extreme + -ism.
I would remind you that extremism in the defense of liberty is no vice! And let me remind you also that moderation in the pursuit of justice is no virtue. [Barry Goldwater (1909-1998), acceptance speech as Republican candidate for President, 1963]
[extremism etymology, extremism origin, 英语词源]
neocon (n.)youdaoicibaDictYouDict
by 1987, abbreviation for neo-conservative in the U.S. political sense.
Neoconservatism is the first variant of American conservatism in the past century that is in the 'American grain.' It is hopeful, not lugubrious; forward-looking, not nostalgic; and its general tone is cheerful, not grim or dyspeptic. Its 20th-century heroes tend to be TR, FDR, and Ronald Reagan. Such Republican and conservative worthies as Calvin Coolidge, Herbert Hoover, Dwight Eisenhower, and Barry Goldwater are politely overlooked. [Irving Kristol, "The Neoconservative Persuasion," in "The Weekly Standard," Aug. 25, 2003]