A hot group is not a name for a newfangled team, task force, or committee. Rather, a hot group is defined by a distinctive state of mind coupled with a style of behavior that is intense and sharply focused on its ultimate goal. Stretching themselves beyond their own expectations, members of a hot group plunge into enterprises that have the potential to change, even ennoble, their own and others' lives. Still, Lipman-Blumen and Leavitt recognize the...