Demonstrating good manners goes way beyond not talking with your mouth full. Rudeness can lead to hurt feelings, misunderstandings, and ultimately conflict. But exactly what constitutes good manners can differ from culture to culture, region to region, and generation to generation. What is acceptable behavior to some, may be downright rude to others.
Rudeness: Deal with it if you please shows kids just how harmful rudeness can be, and explains how the keys to conflict resolution--sensitivity, consideration, and respect--are also the basis of good manners everywhere.