
1) Idealism 2) Knight errantry 3) Quixotic behavior
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https://www.crosswordclues.com/clue/quixotism

Quixotism (əm or əm) (adj. quixotic) is impracticality in pursuit of ideals, especially those ideals manifested by rash, lofty and romantic ideas or extravagantly chivalrous action. It also serves to describe an idealism without regard to practicality. An impulsive person or act might be regarded as quixotic. Quixotism is usually related to `ov....
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http://en.wikipedia.org/wiki/Quixotism

idealistic or quixotic principles or beliefs
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http://phrontistery.info/q.html

• (n.) That form of delusion which leads to extravagant and absurd undertakings or sacrifices in obedience to a morbidly romantic ideal of duty or honor, as illustrated by the exploits of Don Quixote in knight-errantry.
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http://thinkexist.com/dictionary/meaning/quixotism/
Quix'ot·ism (kwĭks'ŏt*ĭz'm)
noun That form of delusion which leads to extravagant and absurd undertakings or sacrifices in obedience to a morbidly romantic ideal of duty or honor, as illustrated by the exploits of Don Quixote in knight-errantry.
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http://www.encyclo.co.uk/webster/Q/13

(sometimes cap.) quixotic character or practice. · a quixotic idea or act.
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https://www.infoplease.com/dictionary/quixotism
No exact match found.