I think the more common problem for most of us is how would you protect yourself from a government than how would you protect yourself without a government, you don't need to replace a cancer with anything once it's cured.
You can still build organization and specialized jobs within anarchy and without a state government, political parties, etc. Look at anarcho-syndicalism, synthesis anarchism, federated associations, and platformism with principles in decentralization and free association without coercion.