Answer: Unity
Explanation: The Hill We Climb is a poem by Amanda Gorman that was recited at the inauguration of President Joe Biden and Vice President Kamala Harris on the 20th of January, 2021.
The central idea of the poem is UNITY.
The poem recognizes that the United States of America being a nation with people from diverse backgrounds and nationalities is bound to have differences but those differences are what should unite the people of America and not divide them.
The poem preaches unity as the only way in which the people of America can fully utilize their potentials and make a better nation.