Если не верите - вот статьи на эту тему.
Drury J. Social Identity as a Source of Strength in Mass Emergencies and Other Crowd Events // International Journal of Mental Health. 2003. Vol. 32, No. 4. P. 77–93
Klar M., Kasser T. Some Benefits of Being an Activist // Political Psychology. 2009. Vol. 30, No. 5. P. 755–777