Utopian

Webster's Dictionary of the English Language

·noun An inhabitant of Utopia; hence, one who believes in the perfectibility of human society; a visionary; an idealist; an Optimist.

II. Utopian ·adj Of or pertaining to Utopia; resembling Utopia; hence, ideal; chimerical; fanciful; founded upon, or involving, imaginary perfections; as, Utopian projects; Utopian happiness.