establish justice, make sure to insure domestic tranquility, securing the blessings of liberty to ourselves and our prosperity and provide common defense also to promote the general welfare
The main job of the government as a whole is to serve the people under its rule. Its job is also to keep everything under control so there isn't chaos. <<<These are the most important things the government is supposed to do
Let me know if this is what you needed because, at least in the US government, there are different branches that have different importance.
