Why might Carl Sandburg have placed emphasis on politeness among the animals in the committee of sixty-six in the interaction the animals have with humans in"How the animals lost their tails?

Carl Sandburg placed an emphasis on politeness among the animals in the committee of sixty-six in order to teach the children the said virtue. Since the audience of his works target children who are in their school ages, courteousness and politeness are very crucial to develop at this early age.