Paul Loeb: Particularly in these difficult times, we often use our children as reasons to avoid getting involved in critical issues. We’ve got all we can handle holding on to our jobs and spending a little time with them. We fear political commitments will make their lives more insecure. Especially when they’re young, it may be all we can do just to go to work, come home, pay attention to their needs, and catch a few scarce hours of sleep. Yet when we do find ways to get engaged, our children can give us powerful reasons to act.