Principles of Government and How They Relate to Guns, Gambling, Drugs, Etc.

I've often weighed the role of government. I have boiled my thoughts on government down to one main principle and two supporting principles:

1. Government should protect its citizen's individual freedom foremost.
2. Government should accomplish this by:
   a. Protecting citizens from outside entities (other countries' armies, terrorist, etc.)
   b. Protecting citizens from each other

All laws, taxes, fees, statues, governmental bodies, etc. should support align with these principles. Laws should only restrict or limit individual freedom (#1) to accomplish protecting that individual from other entities or other citizens (#2a or #2b). These restrictions should only happen in circumstances where all other avenues have been explored and proven ineffective.