Historical clue formulations

• Epitome of herd mentality — 2021-01-31
• Not an independent thinker — 2009-04-19
• Hardly an independent thinker — 2006-02-24
• Animal in a mass migration — 2002-11-04
• Victim of herd mentality — 2000-09-28
• Animal with a herd mentality — 1998-02-04