What are the six purposes of government outlines in the preamble to the constitution?

The six purposes of government outlined in the preamble to the Constitution are:
1. To form a more perfect union;
2. To establish justice;
3. To insure domestic tranquility;
4. To provide for the common defense;
5. To promote general welfare;
6. To secure blessings for themselves and their posterity.

Explanations:
Forming a better union as necessary because the colonies or states were not working together.
Promoting justice was necessary during the settlement period, such as "The Wild West".
 It was necessary to ensure domestic tranquility to avoid warfare between the states, and to unify for the common defense.
To promote welfare and prosperity for all.

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