The current system of law is generally produced in a manner like this: the public casts ballots (voting) and certain people are chosen (elections). Some of these people write things down (creating bills) and then the group of chosen people vote on it (making laws). If enough do, it becomes law and now must be followed or else (prison).
It seems humans mostly agree that stealing is Not Good. The problem, like with many things, is the definition.
Is it stealing if someone takes something from a deceased person? How long does something have to be left alone before it is considered abandoned?
Trust is a fundamental part of human social reality. It is a requirement for interaction to go smoothly.
If you deny that free markets can include the lubricant of trust so you can promote a theory for government being necessary, where violence in favored instead of trust, you have chained yourself with a straw man argument.
Humans have lived with amounts of aggression in their lives for so long, that currently even to question the practice is seen as backward.
Yet aggression can only beget more aggression. Feed a bully or a politician your monies and he’s sure to take more.