Historical clue formulations

• Person who cherishes high principles — 2020-02-18
• Romantic — 2006-09-02
• Utopia seeker — 2000-10-08
• Don Quixote, e.g. — 1998-11-29
• Visionary — 1998-06-25
• Utopian — 1998-04-17
• VISTA worker, perhaps — 1997-02-06