What do you think were the two most significant changes in the United States in the Jefferson era

One of most significant changes in the United States in the Jefferson era was getting rid of unpopular taxes, such as tax on whiskey.

Jefferson had diverse perspective towards the economy and believes the federal government of the United States of America should always play a limited role in the lives of the American citizens and also in the economy.

Secondly, Jefferson drastically reduced the size of the American army during his era, The Navy were also prevented from expanding while he was the American president.