Worked on my international crime essay.
Did everything but the conclusion. Just analyse my body paragraphs and see if they work. Need feedback soon because half yearlies are coming up!
I only had a quick skim through but what I think you need to do the most is established your argument in the introduction. Yes, you can say to an extent it is effective but then you must explain why that is ONLY TO AN EXTENT. In your second paragraph the evidence of the argument of state sovereignty is prevalent, yet you didn't mention that in the introduction and didn't carry it throughout the whole essay. Also, ineffectiveness of the ICC can also be that cases are only prosecuted when the domestic courts can't or unwilling to do so. Cases to the ICC can only go there if that country has signed the Rome Statute or The United Nation's Security Council has referred them though one of their Resolutions. So developing your argument must be a strong starting point in improving your essay, which will then address the sustained, logical and cohesive element of the marking criteria.
Also for international legal systems, you may want to talk about International Tribunals such as the International Criminal Tribunal of Rwanda or the International Criminal Tribunal of Yugoslavia. You are not limited to these as there is also the International Court of Justice, etc.
Remember, your crimes essays are aiming to be approximately 600 words long so you can flesh out some more legal issues or cut down on the ones that are not so important, remembering that issues with recent laws, media and cases are preferred over older ones.
Hope this is some help!