Final answer:
The letters from Thomas Jefferson to George Washington likely addressed themes such as national unity, political opposition, and the peaceful transition of power, influential in Washington's farewell address.
Step-by-step explanation:
The key points from the letter written by Thomas Jefferson to George Washington encompass important themes and concepts regarding the United States government and its historical context. While the exact letter from Jefferson to Washington isn't provided, we can infer common themes based on Jefferson's other letters and historical accounts of his interactions with Washington. These points would touch upon the following: national unity, the importance of subordinating sectional and ideological differences, political opposition, crafting of public statements, maintaining legacy, and the peaceful transition of power when Washington decided not to seek a third term. Jefferson, along with Madison and Hamilton, influenced Washington's farewell address, stressing unity and setting a precedent for the limitation of presidential terms.