[Thomas Weigend is Professor of International and Criminal Law at the University of Cologne]
In his elegantly written and profound article, James Stewart argues in favor of abandoning, in international criminal law, the traditional distinction between perpetratorship and complicity. He favors a unitary solution: every person who substantially contributes to the commission of an international offense should simply be convicted of that crime, with individual differences as to the degree of responsibility to be taken into consideration only at the sentencing stage.
Stewart’s proposal will immediately appeal to any lawyer who has ever ploughed through the intricacies of the distinction among several modes of liability, be it under domestic or international criminal law. The lives of judges, advocates and law students alike would be easier if they did not have to worry about the fine lines between aiding and committing, or between instigating another person to commit a crime and using that person as an (“innocent”?) agent.
With regard to the law of complicity, it is not difficult to find examples of contradictions and inconsistencies in the jurisprudence of international criminal tribunals, and Stewart points them out with wit and precision. I fully concur with this part of the author’s analysis. For example, the fact that some legal systems require a “substantive contribution” for aiding and abetting clearly is a red herring invented for the purpose of allowing judges some leeway in assessing the criminal liability of persons who are marginally involved in the “core” crime. Depending on the way one interprets this concept, “substantive contribution” can mean a little less or a little more than providing a sine qua non contribution to the actus reus. Likewise, the contested issue of whether an accomplice can act with a lesser degree of mens rea than the perpetrator leads to intractable quandaries: Isn’t it unfair to hold A liable for complicity in a special intent crime when he lacks that special intent? But why, on the other hand, should B who knowingly helps a perpetrator of genocide go unpunished just because B does not act with genocidal intent? Much of this has to do with the mess that international criminal law has made of mens rea, but it remains true that the distinctions of various levels of liability (and the cracks between them) lead to particularly unconvincing results in the area of complicity.
