An alien has just landed from outer space. explain to that alien the purpose of government.

The purpose of our Federal Government, as found in the Preamble of the Constitution, is toestablish Justice, insure domestic Tranquility, provide for the common defense, promote the general Welfare, and secure the Blessings of Liberty to ourselves and our posterity.

I believe that I'd use the current definition of government or the political direction and control exercised over the actions of the members, citizens, or inhabitants of communities, societies, and states.

Iwould like a photo instead of all this and you can’t just go out asking for a paragraph thinking someone will be like oh yeah here it is