I am writing an academic paper and I have dyslexia. Any help with the below sentences is welcome.

Unless the marginal consumer who benefits through free-riding imposes such a high cost on all purchasers that
prevent/prevents them from spending as much on security as they would like to if the free-riders problem was being avoided, a good fails to be a public good.
This name and shame strategy does not solve all of the problems concerning the private production of public goods, but it is
particularly/ in particular effective in traditional societies and small communities.
Whereas on a lower level catching a criminal could actually be outsourced to a bounty hunting company, on a higher level, a DRO could operate like an international organization that mediates between different DROs in establishing uniform laws between
several DROs.
Is several here redundant?

Somalia was
made up of ideological communists / was ideological communist. Eventually a civil war
developed/broke out and the answer of the international community was to try to establish a new state.
One would expect a drop in human development
levels because war normally destroys modes of production and human well-being.
Is level redundant here? What would be the preferable option?
Thank you.