Another study confirms that "tribal instincts" often reign supreme, and that ethics is often subservient to groupthink.

(According to the "Moral foundations theory", loyalty is one of the five foundations of morality:

• Care: cherishing and protecting others; opposite of harm
• Fairness: rendering justice according to shared rules; opposite of cheating
• Loyalty: standing with your group, family, nation; opposite of betrayal
• Authority or respect: submitting to tradition and legitimate authority; opposite of subversion
• Sanctity or purity: abhorrence for disgusting things, foods, actions; opposite of degradation