Utopian
Utopian , adjective
Of or pertaining to Utopia; resembling Utopia; hence, ideal; chimerical; fanciful; founded upon, or involving, imaginary perfections; as, Utopian projects; Utopian happiness.
Utopian , noun
An inhabitant of Utopia; hence, one who believes in the perfectibility of human society; a visionary; an idealist; an optimist. — Hooker