From the preamble to the US Constitution:
- To form a more perfect Union,
- To establish Justice,
- To insure domestic Tranquility,
- To provide for the common defense,
- To promote the general Welfare, and
- To secure the Blessings of Liberty to ourselves and our Posterity.
The meanings to all these are...
- Governance is across the different state boundaries with the internet, and keeping the union together
- Establish legislation and rule of law
- Establish enforcement of the law - police
- Establish a means for national defense - standing army or militia to protect us from all foreign and domestic enemies
- Govern for the common good
- Govern not just for (and in) the here and now - but with an eye to serving future generations
The whole preamble to the constitution is:
"We the People of the United States, in Order to form a more perfect Union, establish Justice, insure domestic Tranquility, provide for the common offense, promote the general Welfare, and secure the Blessings of Liberty to ourselves and our Posterity, do ordain and establish this Constitution for the United States of America."
There's the preamble and our governments six functions in a nutshell.