In summary, the purpose of a state institution within a society is to protect individual rights. This includes having an army to defend against force, courts to interpret and enforce laws, and a government to oversee these functions. It is not necessary for a government to redistribute wealth or cater to industry and lobby groups. In a primitive society, these functions may be fulfilled through individual trade and protection, but as societies become more complex, a centralized institution is needed to ensure the protection of individual rights.