The Preamble

ESTABLISH JUSTICE: everybody need to be treated fairly,equally and they are also guaranteed that their rights are respected by everyone.

INSURE DOMESTIC TRANQUILITY: make sure that everything in your country, or domestically, is running smooth.
PROVIDE FOR THE COMMON DEFENSE: The government will have the power to form whatever is needed to protect America from other foreign enemies

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PROMOTE GENERAL WELFARE: Bettering the lives of american.

SECURE THE BLESSING OF LIBERTY:the freedom of speech, the liberty to do what one desires, without any fear or prejudice.