What was the louisiana purchase of 1803 and how did it hasten the removal policy of native peoples?

answer: "life, liberty and the pursuit of happiness" is a well-known phrase in the united states declaration of independence. the phrase gives three examples of the "unalienable rights" which the declaration says have been given to all humans by their creator, and which governments are created to protect.

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the us constitution is a living document, meaning that it can be changed over time as the country changes.