Final answer:
George Washington favored friendly trade relations without political entanglements, valued justice and harmony with all nations, and addressed foreign policy challenges critical to U.S. security and economic development.
Step-by-step explanation:
According to George Washington's farewell address and his presidency, he believed that the United States should pursue friendly trade relations with foreign nations while avoiding entangling political alliances. Washington stressed the importance of observing good faith and justice towards all nations and cultivating peace and harmony.
He was particularly concerned with foreign policy challenges such as the settlement of borderlands, as they affected the nation's security and economic development—a view that was shaped by needing to maintain the country's territorial integrity against threats from various entities, including Native Americans, the British, and the Spanish governments.
Washington's administration relied on both military strength and diplomatic efforts to achieve a stable foreign policy, which would ensure the peaceful settlement of western land and the security to navigate the Mississippi River.