[nmap]

My first reaction is that groupthink is rather common. Perhaps the reality of human nature and the desire to fit in provide an ideal environment.

And yet - is it always a bad thing? Seriously. That feeling of unity and invulnerability could contribute to a success mentality, could it not? Granted, there are real and substantial risks, and failure, when it occurs, may be spectacular. However, prior to such failure, the group might be able to achieve much.