utopian
This term carries a dual nature, oscillating between hopeful aspiration and naive delusion. When used positively, it describes a visionary pursuit of a flawless society. However, in most critical or political contexts, it functions as a polite way to label an idea as impractical, unrealistic, or completely detached from human nature. As a noun, the word refers to the individual holding these beliefs. While the adjective describes the quality of the vision, the noun often implies a certain level of stubbornness or blindness to systemic constraints.
Meanings
Modeled on or aiming for a state in which everything is perfect; idealistic to an unrealistic degree.
"The political party presented a utopian vision of a world without poverty or war."
A person who believes in or pursues a socially perfect, though often unattainable, ideal.
"He was dismissed as a utopian who ignored the harsh realities of economic scarcity."
Characterized by an impractical or impossible desire for perfection.
"Her utopian plans for the city failed to account for the actual budget constraints."