States here can imply political order

the optimal outcome of the individual will always outweigh the optimal outcome of the group.

but that is the opposite of the previous paragraph if im getting this right. Since here the criminals will not rely on others "doing the hard work" which is confessing, and they will confess themselves.

because it is during struggles that appears the importance of having the power to enforce you will

This reminds me of last week's reading when the author discussed how politics is about the competition over power during struggles. This power is the ability to enforce their will and having the group accept it.

In Afghanistan, I think, the Taliban are the reason it is a failed State.

In this case since the piracy were stronger than the government and were able to enforce their legitimacy by "defending" the Somalian territory, the sovereignty is then theirs. This would explain why Somalia is a failed state.

The monopoly here belongs to the government which implies that the power that pirates have is not legitimate: they have no authority nor sovereignty.

This is odd because pirates can never defend a country because they do not have an authority.

I think the adjective "effective" is responsible for Somalia being a failed State. However, it is really hard to interpret what effective means?