1.   Yet this refusal to intervene virtually guarantees that core group behavior will continue to be encouraged by profit-minded entrepreneurs.

2.   As with any group behavior, though, laughter has its menacing streak.

3.   Far more important are the social customs of conforming to group behavior, observing formalities, respecting hierarchy, and keeping out of trouble.

4.   If everyone else were to do likewise, what kind of group behavior would emerge?

5.   Second, a seemingly minor change in the rules can radically alter group behavior.

6.   The results undermine prevailing theories about how group behavior evolved, as well as tarnish a beloved childhood icon.

7.   There is something morbidly fascinating about group behavior in extremis.

8.   They also display an exceptional form of group defense behavior when confronted by a predator.