Why do many people see international law as either almost worthless (realists) or as a solution to most issues (liberals), when in reality it is in-between these extremes and sometimes effective?

essay 1:
Why do many people see international law as either almost worthless (realists) or as a solution to most issues (liberals), when in reality it is in-between these extremes and sometimes effective? (2 full pages with 5 works cited)

essay 2:
Why is the International Court of Justice (World Court) often seen as weak since it has little compulsory jurisdiction due to the optional clause and an unclear judiciary hierarchy (even the US which helped create it exempts itself in many cases? (2 full pages with 5 works cited)

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