Dominance and unity here best describes the feeling Kennedy wants to convey in this sentence.
John F. Kennedy wants to symbolize the dominance and unity by stating that how other powers want to be dominant and wanted to influence others.
John F. Kennedy used a statement in his speech- do not ask what your country do for you, instead of that you may ask you can do for your country. He wants the countries to be proud on their freedom and appreciate their independence.
He even appreciated the people to do what is right and beneficial for their interest and greater good.
Learn more about the John F. Kennedy's Inaugural Address here:-
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