What important lesson did the country learn because of the election of 1800?

America learnt that power could be passed from one party to the other and that the vote of the people was a powerful tool

Explanation:

The Election of 1800 saw a keenly contested presidential election between an Incumbent president (president John Adams) of the Federalist party and the Republican candidate Thomas Jefferson. the election was the fourth time That America was going tot the pools to elect an president.

The previous election have produced presidents from the same political party up until the election of 1800. Thomas Jefferson tagged the election "revolution of 1800" because America witnessed a change in power from one political party to another.

Power could be peacefully transferred from one party to another.

Explanation:

The first ever peaceful transition of power after bitterly contested popular elections fought by principled partisans occurred in America, in the Revolution of 1800. After the election that gave the republican party (led by thomas jefferson) control over both the presidency and the congress.