Gov are imho useful to provide a control system (police+military) and tax management. But I can't list any gov who do that efficiently and without corruption but I can list many govs who can maintain order and prevent chaos.

Govs will be imho and in a near futur merged and then replaced with (putted on) blockchain technology to increase the proximity/interaction of the managment unit and guaranty corruption free and very direct democracy. But it must come with descentralized healthcare and physical services along with the descentralization of media to avoid being able to corrupt too large opinions and education ABSOLUTELY SHOULD teach critical thinking to have independent (intelligent) people who can detect and correct issues.