Utopian
Definition 1 of 2

Often Unattainable
Utopian goals can seem impossible since perfection is hard to achieve.

His utopian ideal of world peace seems unreachable in today's climate.
Positive Connotation
Utopian suggests hope for a better future; it's usually positive.

The novel presents a utopian future where technology solves all problems.
Criticism Possible
Some may view utopian ideas as naive. It can be a subtly critical term.

They dismissed her utopian plans as simplistic and impractical.
Compare with
fancifulidealisticidyllicimaginaryimpracticalperfectromanticvisionary
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