quixoticist 

n. a person who is quixotic (exceedingly idealistic; unrealistic and impractical)

Some people think that world peace is but a quixoticist's fantasy.

quixoticist by candidcamel44 July 25, 2009

quixoticism 

Noun: quixotic spirit or tendency towards romantisizing things; unattainable idealism

Lost in his quixoticism, he lived a life of unchecked idealism, dreaming dreams far too unreal and far too out of reach.

quixoticism by Matt Schwab April 4, 2007

Quixotist 

A Quixotist is a person characterized by idealism, enthusiasm, or an impractical pursuit of noble and chivalrous goals, often to the point of being considered unrealistic or romantic.

His Quixotist nature led him to pursue justice even in the face of overwhelming odds.

Quixotist by Wraith Storm December 9, 2023