With what purchase did the mainland united states reach its present size

I would assume this is the Gadsden Purchase

the us government is based on ideas of limited government, including natural rights, popular sovereignty, republicanism, and social contract. limited government is the belief that the government should have certain restrictions in order to protect the individual rights and civil liberties of citizens.

explanation:

actually, not all representation was acceptable based on this little piece of article, in 1776, the second continental congress issued the declaration of independence, stating their specific grievances with the british monarchy and why they were going to create a separate government. after the colonies separated from the british monarchy and formed the united states of america, they had to answer some crucial questions: 1) if not a monarchy, what type of government was the united states going to have? 2) what kind of government was going to protect the people without violating their individual liberties?

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