People used to grow up in small communities where folk wisdom was passed down. But we don't live there anymore. We can't go next door to your aunt and ask her for the answers.
Second, this epic tale allows the audience to actually listen to the Native Americans and receive their wisdom. Spielberg conveys the respect for Native Americans that is normally lacking in Western films.
Those who govern, having much business on their hands, do not generally like to take the trouble of considering and carrying into execution new projects. The best public measures are therefore seldom adopted from previous wisdom, but forced by the occasion.
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