How does the paraphrased inclusion of Theodore Roosevelt's quote about men in the arena in Paragraph 20 contribute to
the central ideas of Nixon's speech?

23. how does specialization among nations encourage interdependence? nations work together to share labor and resources to produce vital goods. nations sign treaties prohibiting taxes on imports. nations produce specific goods and then trade to obtain things they need. nations that are more developed agree to fund development in nations with limited industry.