There are always ways of enforcing norms and mores. These show up in all human societies. Even in a criminal gang, pirate crew, or savage tribe, there are rules, and breaking them will get you punished. The social contract in the US gives the state most of the power as a grant from the sovereign people. Other countries have differing rules, but the fundamental principle behind the rules is ensure justice and fairness, or at least the appearance of such.
This is especially applicable when someone is accused of a crime. Because mobs demand blood and the state is not entirely trustworthy, we weight the system in favor of the accused. Even if someone kills some poor guy in front of a police station on camera with dozens of witnesses, we give him his day in court. However, this only works if the government is willing to punish wrongdoing.... [Read More]